Condition

Seborrheic Dermatitis

Seborrheic dermatitis is a common, long-term rash that causes greasy flaking and inflammation where the skin is oiliest - the scalp, the eyebrows, the sides of the nose, the ears and the chest. Dandruff is its mildest form. It responds well to treatment and returns when treatment stops.
Dr. Schwarz, MD · Board-certified dermatologistLast reviewed September 8, 2026
16:9 hero for Seborrheic Dermatitis. Never cropped: the tone strip and the corner logo depend on the full frame.

Start here

Seborrheic dermatitis is the condition people are most likely to be treating without knowing what it is - persistent flaking at the eyebrows and sides of the nose, an itchy scalp, redness every winter. Treating it as ordinary dry skin makes it worse. It involves a yeast that lives on everyone's skin: not an infection you caught, not a hygiene problem - some immune systems react to that yeast and some do not. And it comes back, so medicated shampoo or antifungal cream once or twice a week indefinitely is the plan, not two weeks and done.

— Dr. Schwarz, Board Certified Dermatologist

Key Facts

−
How commonVery common. Dandruff, its mildest form, affects a large share of adults at some point, and the fuller rash affects a few percent of people
Who gets itTwo peaks - babies in their first few months, where it is called cradle cap, and adults from the teens onward. More common in men, and more common and more stubborn in people with Parkinson's disease and in people whose immune system is suppressed
Curable or managedManaged. It clears well with treatment and returns when treatment stops
Prescription neededOften not. Medicated shampoos and antifungal creams are available over the counter
Time to improveOne to two weeks with the right treatment

What It Is

−

Seborrheic dermatitis is a long-term inflammatory rash where the skin has the most oil glands. On the scalp it causes flaking and itch, which at its mildest is what everyone calls dandruff. On the face it sits at the eyebrows, between them, in the creases beside the nose, at the edges of the ears and inside them, and in the beard area. On the body it turns up mid-chest, sometimes between the shoulder blades, and in the folds under the arms, under the breasts and at the groin.

The rash is discolored or pink skin with greasy yellowish scale on top, finer and oilier than the thick silvery scale of psoriasis, and the patch edges are soft rather than sharply drawn. It often itches, and on the face it burns or stings, especially where the skin is thin.

In babies it looks different. Cradle cap is thick, greasy yellow crust on the scalp, sometimes the eyebrows and folds. It is not itchy, does not bother the baby, appears in the first weeks or months, and almost always clears during the first year.

It is not contagious, not an infection in the ordinary sense, and not caused by being unwashed. It is a reaction to something that lives on everybody.

Symptoms

−
Greasy flaking

Scalp

Yellowish greasy scale with redness on the scalp, ranging from light dandruff to thicker crusting. It flares in winter and with stress. It tends to come and go for years rather than clear once.
Redness in the creases

Face

Redness and fine scale in the eyebrows, the folds beside the nose, behind the ears and sometimes on the eyelids. On deeper skin tones it can leave pale patches as it settles. It responds to anti-yeast treatment rather than moisturizer alone.
Patches on the breastbone

Chest and Body

Scaly patches over the breastbone, between the shoulder blades and in body folds, sometimes ring-shaped. It is often confused with fungal infection or eczema. Sweating and occlusive clothing make it worse.

How It Looks by Skin Tone

−
Salmon-pink patches with fine greasy yellowish scale in the crease beside the nose and through the eyebrow on fair skin, with soft edges that fade into normal skin.Dull pink-brown patches with greasy scale through an eyebrow and beside the nose on medium olive skin, one of them slightly lighter than the surrounding skin at its center.Ring-shaped and petal-shaped patches on brown facial skin along the hairline, each one lighter than the surrounding skin with fine scale across it and soft edges.Pale patches along a hairline and through the beard area on deep brown skin, some with a trace of fine scale, blending into the surrounding skin without a clear border.
LightMediumBrownDeep

On deeper skin tones, seborrheic dermatitis often looks different enough to get missed. The pink or red base is usually not visible. What shows instead is scaling on skin that looks lighter than the area around it, or ring-shaped and petal-shaped patches, particularly on the face and along the hairline. Those lighter patches are the most common reason people come in - the flaking matters less to them than the uneven tone.

The pigment loss is temporary. Inflammation interferes with pigment production; it is not damage, and the color returns once the inflammation is controlled. That can take several months, sometimes longer than the rash itself, and treating early shortens it. Hair care matters practically. The standard advice - a medicated shampoo two or three times a week - assumes frequent washing, which does not suit every hair type, and can damage textured or chemically treated hair. The alternatives work: apply the shampoo to the scalp only, in sections, and rinse without lathering the length; use an antifungal foam, lotion or oil made to stay on between washes; or use an antifungal cream on the hairline and face while shampooing on your normal schedule. Tell your dermatologist how often you wash your hair, because the plan should be built around that.

Where It Shows Up

−
Front view of a head with red marks across the scalp, on both eyebrows and between them, in the creases beside the nose, on both ears and along the beard area of the jaw.
Scalp, brows, beside the nose and the ears
It sits only where the oil glands are dense: the scalp, the eyebrows and the skin between them, the creases beside the nose, the edges and insides of the ears, and the beard area. If a rash is nowhere near an oily area, this is usually not what it is.
Front view of a whole body with red marks down the middle of the chest, in both armpits, under both breasts and across the groin.
Middle of the chest and the skin folds
On the body it takes the middle of the chest and the folds — under the arms, under the breasts and at the groin. These are warm, damp and oily, which is what the yeast behind it needs.

What Happens in the Skin

−

This is what is going wrong under the skin, in the order it happens. Click a step to see it.

How Seborrheic Dermatitis happens
Skin basics
BARRIEREPIDERMISDERMISPOREOILGLAND0NORMAL SKIN1SKIN OIL2MALASSEZIA FEEDING ON THE OIL3THE IMMUNE SYSTEM REACTS4BARRIER DAMAGE AND FLAKING

The scalp, the creases beside the nose, the ears and the mid-chest are crowded with oil glands, and a thin film of skin oil covers them. A yeast called Malassezia lives on that oil on almost everyone. In most people the skin takes no notice of it.

Oil glands are packed together on the scalp, the face creases, the ears and the mid-chest, and they release a steady supply of skin oil. This is why the rash only ever appears in those places.

A yeast that lives on everybody's skin feeds on the fats in that oil. It splits them and leaves behind free fatty acids and other by-products on the surface.

In some people the skin's immune cells treat those by-products as something to fight, and the area becomes inflamed. Everybody carries the yeast; this step is the part that differs between people.

The inflammation damages the skin's barrier, so it loses water, stings, and sheds greasy scale far faster than it should. That leaky, flaking skin is what you see and feel, and almost everything on the lists below is pushing on this step.

The outer film of dead cells and oil. It holds water in and keeps irritants out, and it is thinner than a sheet of paper. Almost every dry, itchy, stinging skin problem starts here.

The outer layer, and the only one anything in a jar reaches. It renews itself constantly: a cell made at the bottom takes about a month to reach the surface and flake off. Most of what a skincare product does, it does here.

The living layer underneath, holding the blood vessels, the nerves and the collagen. It is where lasting change happens and it is hard to reach: most of what is sold for the skin never gets this far.

Three things have to line up, and everyone has the first two.

The first is skin oil. Seborrheic dermatitis appears only where oil glands are dense - scalp, eyebrows, nose creases, ears, chest and body folds. That is why it starts in babies while the mother's hormones still drive their oil glands, disappears through childhood when oil production is low, and comes back at puberty.

The second is a yeast called Malassezia. It lives on essentially every adult and normally causes no trouble. It feeds on the fats in skin oil, splitting them and leaving free fatty acids and other by-products.

The third is your immune system, and this is where people differ. Some skin reacts to those by-products with inflammation. The inflammation damages the barrier, the skin scales and flakes, and that is what shows. People who get seborrheic dermatitis do not have more yeast. They respond to it differently.

That is why antifungal treatments work: less yeast means less for the immune system to react to. It also explains why it returns - the yeast lives there, and the immune response has not changed.

Conditions affecting the nervous system, particularly Parkinson's disease and recovery from a stroke, are strongly associated with severe seborrheic dermatitis, probably through facial oil production and movement. A suppressed immune system brings more severe, more widespread disease.

Risk Factors

−

It is about the skin you were born with and the state your body is in, not how clean you are.

Inherited
A family tendency
It runs in families, alongside oily skin and dandruff, though no single gene explains it.
Inherited
Naturally oily skin
More oil where the yeast feeds. Being unwashed is not a risk factor; oily skin is.
Inherited
Being male
Consistently more common in men, fitting the role of androgens in oil production.
Age
Age
Two peaks - the first months of life, then adulthood from the teens onward, staying high through middle age.
Other health conditions
Neurological conditions
Parkinson's disease especially. Often more severe and harder to control, and it can appear before other symptoms.
Other health conditions
A suppressed immune system
More common, more extensive and more stubborn when illness or medication weakens it.
Other health conditions
Some medicines
A few are linked with it, particularly some for neurological conditions. Never stop a prescribed medicine on your own - ask your doctor.
Season & stress
Winter and low humidity
Clear seasonality for most people - better in summer, worse in the colder, drier months.
Season & stress
Stress, fatigue and illness
Flares regularly follow poor sleep, a stressful stretch, or a hospital stay.

Course

−

Seborrheic dermatitis is chronic and it relapses. Almost every disappointment with treatment comes from expecting a cure. The infant version is the exception.

First months0-12 months
Cradle cap clears on its own

The infant version appears in the first weeks or months and may spread to the eyebrows and folds. It clears by around the first birthday in nearly every child, rarely needs more than gentle care, and does not predict the adult version.

ScalpEyebrowsSkin folds
Teens and twentiesRoughly 13-29
The adult version usually starts here

It begins in the teens or twenties and persists for decades, waxing and waning rather than coming in clean episodes.

ScalpFaceChest
Adulthood30 and up
Worse in winter, better in summer

Most people are worse in winter, better in summer, worse when stressed or run down. Some only ever have scalp flaking; others have the face and chest too, and the facial part bothers people most.

Living with itAny adult age
Treatment works fast and stops working fast

Treatment usually works within one to two weeks and stops working just as quickly when it is stopped. Without maintenance, most people are back where they started within a few weeks to a couple of months. Once or twice a week permanently keeps it quiet. That is not treatment failure. It is how the condition behaves.

What Makes It Better & Worse

−

Four things drive it — skin oil, Malassezia yeast feeding on that oil, your immune system reacting to what the yeast leaves behind, and barrier damage. The treatment that helps depends on which step is driving your flare — a scalp thick with scale needs something different from a stinging face.

What is driving yours?

FATPOREOILGLANDBARRIEREPIDERMISDERMIS

Oil glands are packed together on the scalp, the face creases, the ears and the mid-chest, and they release a steady supply of skin oil. This is why the rash only ever appears in those places.

A yeast that lives on everybody's skin feeds on the fats in that oil. It splits them and leaves behind free fatty acids and other by-products on the surface.

In some people the skin's immune cells treat those by-products as something to fight, and the area becomes inflamed. Everybody carries the yeast; this step is the part that differs between people.

The inflammation damages the skin's barrier, so it loses water, stings, and sheds greasy scale far faster than it should. That leaky, flaking skin is what you see and feel, and almost everything on the lists below is pushing on this step.

What makes it worse

  • Heavy oils, pomades and greasy products The yeast feeds on their fats.
  • Growing a beard A new warm, oily area, often read as dry skin.
  • Sweating under hats and helmets Warmth and moisture suit it.
  • Washing less often than the scalp needs Oil and scale build up.

What helps

  • An antifungal shampoo, used properly Ketoconazole on the scalp, five minutes before rinsing.
  • Zinc pyrithione, selenium or ciclopirox Alternatives that reduce the same yeast.
  • Antifungal cream on the face and chest A few times a week once the flare settles.
  • Maintenance, permanently Shampoo or cream once or twice a week.

What makes it worse

  • Stopping the medicated shampoo The most common reason it comes back.
  • Using only a moisturizer on the face Nothing touches the yeast.

What helps

  • A topical steroid for a flare A short course, not the long-term plan.
  • Non-steroid creams for the face Tacrolimus and pimecrolimus, no skin thinning.
  • Sunlight, in moderation Many improve in summer, but sunburn is not a treatment.

What makes it worse

  • Stress, poor sleep and being run down A reliable trigger.
  • Illness and a suppressed immune system Widespread disease needs a doctor.

What helps

  • Salicylic acid, urea or coal tar Loosen thick scale so the antifungal reaches skin.
  • Oil the scale, then lift it carefully A soft brush and gentle washing.
  • A plain moisturizer on the face Reduces stinging and flaking while the antifungal works.
  • Gentle washing, not aggressive washing Mild cleanser, lukewarm water, no scrubs.
  • For cradle cap, do very little Soften the crust, wash gently, leave the rest.

What makes it worse

  • Winter and dry indoor air The rash returns every year at the same time.
  • Picking or scraping the scale off More damage, more flaking.
  • Scrubs, toners and acids on the face They strip skin that is already inflamed.

How These Treatments Work

−

Treatments for Seborrheic Dermatitis do not all work in the same place. Tap one to see where it acts.

Pick a treatment
Skin basics
BARRIEREPIDERMISDERMISPOREOILGLANDKILLS YEASTCALMS THE REACTIONLIFTS THE FLAKESTAKES AWAY ITS FOOD

The yeast feeds on skin oil, and the rash is the reaction to it.

Turns down the redness and itch while the antifungal handles the cause.

Loosens the scale so everything else can reach the skin underneath.

Less oil on the surface means less for the yeast to live on.

The outer film of dead cells and oil. It holds water in and keeps irritants out, and it is thinner than a sheet of paper. Almost every dry, itchy, stinging skin problem starts here.

The outer layer, and the only one anything in a jar reaches. It renews itself constantly: a cell made at the bottom takes about a month to reach the surface and flake off. Most of what a skincare product does, it does here.

The living layer underneath, holding the blood vessels, the nerves and the collagen. It is where lasting change happens and it is hard to reach: most of what is sold for the skin never gets this far.

Over-the-Counter Products

−

Everything here you can buy without seeing anyone.

16:9 hero for Ketoconazole. Never cropped: the tone strip and the corner logo depend on the full frame.Diagram: how Ketoconazole works in the skin
Strong evidence
The first thing to reach for, as a 1% shampoo used two or three times a week. It reduces the yeast, so the immune system has less to react to, and most people are clear in one to two weeks. It only works if it goes onto the skin and stays there five minutes — rinsing it straight out is the single most common reason people think it failed.
Four dandruff shampoo bottles: DHS Zinc, Head and Shoulders Classic Clean, CeraVe Anti-Dandruff and Head and Shoulders Bare16:9 hero for Pyrithione Zinc. Never cropped: the tone strip and the corner logo depend on the full frame.
Moderate evidence
The active ingredient in most ordinary anti-dandruff shampoos, and a reasonable choice for scalp flaking without much inflammation. It is gentler and easier to use often than ketoconazole. If it has stopped helping, rotating to a different active ingredient usually works better than looking for something stronger.
Two Selsun Blue bottles, two Head and Shoulders Clinical Strength bottles and a Vichy Dercos bottle and box16:9 hero for Selenium Sulfide. Never cropped: the tone strip and the corner logo depend on the full frame.
Moderate evidence
Another shampoo that reduces the same yeast by a different route, useful when ketoconazole has lost its edge. It works well on a thickly scaling scalp. It has a strong smell and can discolor light, gray or chemically treated hair, so rinse thoroughly and keep it off the length where you can.
Ciclopirox shampoo
Ciclopirox shampoo
Moderate evidence
A third antifungal option with good trial evidence, worth knowing about when the first two irritate the scalp or have stopped working. It is used two or three times a week with the same five-minute contact time. In many places it is a prescription rather than something on the shelf.
A plain white ointment tube lying on its side, labeled Hydrocortisone with a blue swoosh16:9 hero for Hydrocortisone. Never cropped: the tone strip and the corner logo depend on the full frame.
Moderate evidence
A mild steroid cream that settles the stinging and redness on the face within a few days, which no antifungal does that quickly. Use it for a week or two to break a flare, not as the ongoing plan — the skin beside the nose and on the eyelids thins with repeated use. Something anti-yeast has to run underneath it.
Paula's Choice 2% BHA exfoliant, La Roche-Posay Effaclar cleanser and a CeraVe psoriasis cream pumpLabeled cutaway diagram of a single skin pore, headed Salicylic Acid. The epidermis is a brick-textured band across the top and the dermis is pink below it, with a yellow oil gland at the base of the pore and a small cluster of bacteria inside it. A single dark navy callout line points into the top of the pore: decreases dead cells in pore. There are no other callouts, so the drawing shows one effect where the other ingredient diagrams show two or three.
Limited evidence
A descaler for a scalp that has built up a thick crust. It loosens the scale so the antifungal underneath can actually reach the skin. It does nothing to the yeast or the inflammation, and on an already stinging face it is more likely to irritate than to help.
Five medicated scalp products on white, including Amazon Basics tar gel, T+Plus, MG217, RoyceDerm and Nizoral16:9 hero for Coal Tar. Never cropped: the tone strip and the corner logo depend on the full frame.
Limited evidence
An older shampoo that slows scaling and helps some people with a stubborn, thickly flaking scalp. It is more useful when psoriasis is in the picture too. It smells strong and can stain light hair, and there are gentler options with better evidence for this condition, so it is rarely where to start.
Five dark glass tea tree essential oil bottles with glass droppers and one green box on white16:9 hero for Tea Tree Oil. Never cropped: the tone strip and the corner logo depend on the full frame.
Weak evidence
A 5% shampoo has been tested in dandruff with a modest result, and some people do find it helps. It is a common cause of allergic reactions on the face, so it is best kept to the scalp. Undiluted oil straight onto inflamed skin is a reliable way to make things worse.
Five coconut oil bottles and a jar on white, most labeled fractionated or organic virgin coconut oil16:9 hero for Coconut Oil. Never cropped: the tone strip and the corner logo depend on the full frame.
Weak evidence
The most popular home remedy for this, and one of the few that can genuinely backfire. Malassezia feeds on the fats in most plant oils, so oiling the scalp can hand it more of what it uses, and heavy oils also trap scale against the skin. Softening a crust before washing is the one job an oil does well here.

Prescriptions

−

These need a prescription.

16:9 hero for Ketoconazole. Never cropped: the tone strip and the corner logo depend on the full frame.
Ketoconazole 2% cream
Strong evidence
The prescription strength, as a cream for the face, ears, beard area and chest, where a shampoo is impractical. Used daily it settles a facial flare in one to two weeks, then drops to twice a week to hold it. It treats the yeast and not the inflammation, so a sore, stinging face often needs something alongside it for the first week.
16:9 hero for Roflumilast Cream (Zoryve). Never cropped: the tone strip and the corner logo depend on the full frame.Diagram: how Roflumilast Cream (Zoryve) works in the skin
Strong evidence
A once-daily non-steroid foam approved specifically for seborrheic dermatitis, and it works on the scalp and the face with the same product. It suits people who have been leaning on steroid creams on the face for a long time. Cost and insurance coverage are usually the deciding factor rather than the medicine.
16:9 hero for Tacrolimus (Protopic). Never cropped: the tone strip and the corner logo depend on the full frame.Diagram: how Tacrolimus (Protopic) works in the skin
Moderate evidence
Calms the inflammation on the face without thinning the skin, which is what makes it useful around the nose creases and the eyebrows where steroids cannot be used for long. It stings or feels warm for the first few applications and then settles. It is often used twice a week to hold a face that keeps flaring.
16:9 hero for Pimecrolimus (Elidel). Never cropped: the tone strip and the corner logo depend on the full frame.Diagram: how Pimecrolimus (Elidel) works in the skin
Moderate evidence
The gentler of the two non-steroid creams, and usually the better fit for thin, easily irritated facial skin. It works a little more slowly than tacrolimus and stings less. Like tacrolimus, its main job here is keeping a face clear without steroids.
16:9 hero for Desonide. Never cropped: the tone strip and the corner logo depend on the full frame.Diagram: how Desonide works in the skin
Moderate evidence
A mild prescription steroid for a face that is inflamed and sore, used for one to two weeks to break the flare. It is stronger than over-the-counter hydrocortisone and still gentle enough for facial skin. It is a short course, not a maintenance plan — long steroid use on the face causes its own rash.
16:9 hero for Clobetasol Propionate. Never cropped: the tone strip and the corner logo depend on the full frame.
Clobetasol scalp solution
Moderate evidence
A strong steroid shampoo or solution, used on the scalp only, for a thickly scaling flare that an antifungal has not shifted. Two to four weeks at most. It is never for the face, and the antifungal has to keep running underneath it or the flare simply comes back when the steroid stops.
An amber prescription bottle lying on its side on a white background with a plain white label reading Itraconazole, and six small round white tablets spilled out in front of it.
Itraconazole
Moderate evidence
Antifungal tablets, usually a short course, for seborrheic dermatitis that is severe, widespread, or has not responded to creams and shampoos used properly. They clear it faster than anything applied on the skin. It interacts with a long list of other medicines and needs a full list of what you take before it is started.
16:9 hero for Fluconazole. Never cropped: the tone strip and the corner logo depend on the full frame.Diagram: how Fluconazole works in the skin
Limited evidence
A weekly antifungal tablet sometimes used for widespread or stubborn disease when itraconazole does not suit. The evidence for it in this condition is thinner. Either way, tablets clear a flare rather than change the condition, so the shampoo or cream still has to continue afterwards.
A white blister pack photographed flat on a white background, holding eight white oblong capsules in two rows of four under clear domes. ACCUTANE is printed in blue capitals on the empty left half of the foil.Diagram: how Accutane works in the skin
Limited evidence
A low dose shrinks the oil glands, and with less oil there is less for the yeast to feed on. It is reserved for severe disease that nothing else has controlled, because it dries the skin, lips and eyes and requires strict pregnancy prevention and monitoring. It is an unusual choice here, not a routine one.
16:9 hero for Terbinafine. Never cropped: the tone strip and the corner logo depend on the full frame.Diagram: how Terbinafine works in the skin
Weak evidence
A common antifungal tablet that people are often given for this, and it is a poor match — it works well on the fungi behind athlete's foot and nail infections but has little effect on Malassezia. If a course of it has done nothing, that is expected rather than a sign the diagnosis was wrong.

Procedures

−

These are done in the office, usually over several visits.

16:9 hero for Phototherapy. Never cropped: the tone strip and the corner logo depend on the full frame.16:9 hero for Narrowband UVB Phototherapy. Never cropped: the tone strip and the corner logo depend on the full frame.
Limited evidence
Narrowband UVB in a clinic, considered only for widespread disease on the body that has not responded to creams. It fits with the fact that most people improve in summer. It means several visits a week for weeks, which is a lot of effort for a condition that usually answers to a shampoo, so it is rarely used.

When to See a Dermatologist

−

Mild scalp flaking usually does not need an appointment - an over-the-counter antifungal shampoo, left on long enough, two or three times a week, settles most of it. Book if two to four weeks of a medicated shampoo used properly has not helped, if the rash on your face is inflamed or sore, if it is in the ear canal or on the eyelid edges, if the scalp is weeping, crusting or losing hair, or if it is spreading beyond the usual oily areas. Book sooner if it came on suddenly, is severe, or covers much of the body, sooner again with a neurological condition or a medicine affecting your immune system, and for a baby if cradle cap is spreading widely, looks infected, or is bothering the child. The distribution does the diagnostic work, so no test is usually needed - the visit gets you a strength matched to the area, a non-steroid option for the face, and a plan built around how often you wash.

— Dr. Schwarz, Board Certified Dermatologist

Complications

−

Pale marks left behind

On deeper skin tones the rash commonly leaves flat pale patches, often ring-shaped or petal-shaped, along the hairline and on the face. For many people these are the real complaint, not the flaking. The color comes back — the inflammation interrupted pigment production rather than destroying it — but it can take several months, and treating the inflammation early is what shortens it.

Sore, crusted eyelid edges

Seborrheic dermatitis can settle on the rims of the eyelids, where it causes greasy crusting at the base of the lashes, redness along the edge, grittiness and morning stickiness. It is common and it is treatable, but face creams and shampoos are not safe this close to the eye. It needs its own plan, so mention it rather than treating it yourself.

Infection in scratched skin

Scratching or scraping the scale off breaks the skin, and bacteria can settle in the damage. The signs are golden-yellow crust, weeping, a hot sore area, or swollen glands in the neck. It is uncommon, and it clears with antibiotics, but it needs to be seen rather than treated with more shampoo.

Lookalikes

−

Scalp Psoriasis

The hardest one to separate, and some people genuinely have both at once. Psoriasis scale is thick, dry and silvery, sitting on a raised patch whose border you can trace with a finger, and it often carries on past the hairline onto the forehead. Seborrheic scale is finer, greasier and yellowish, on patches with soft edges that fade out. Nail pitting or patches on the elbows and knees settle it.

Rosacea

Both sit in the middle of the face, and plenty of people have the two together. Rosacea is redness and flushing across the cheeks, nose and chin, often with visible small vessels and sometimes with bumps and pustules, and it has no scale. Seborrheic dermatitis prefers the eyebrows, the creases beside the nose and the hairline, and it always flakes.

Ringworm

A scaly scalp in a child is far more likely to be a fungal infection than seborrheic dermatitis, and this is the one it matters most not to miss. Ringworm makes a round patch with hairs snapped off close to the skin, often a bald area and swollen glands in the neck. It needs antifungal tablets — shampoo will not clear it. On the body it makes a ring with a raised scaly rim and a clear center.

Myths

+
  • “Flaking means my scalp is dry, so I should wash it less.” The most common wrong turn. The flaking comes from inflammation, and the scale is oily rather than dry. Washing less lets oil and scale build up and makes it worse. Moisturizer alone does nothing.
  • “It is caused by poor hygiene.” It is not The yeast lives on everyone regardless of how often they wash; the difference is how the immune system responds. Plenty of people with immaculate routines have it.
  • “It is contagious.” It is not Nobody catches dandruff or seborrheic dermatitis from a hairbrush, pillow, hat or person. The organism is already on all of us.
  • “Natural oils will fix it.” Malassezia feeds on the fats in many plant oils, so coconut oil and similar give it more of what it uses. Some oils are less usable, but oil is generally not the answer, and heavy oils trap scale against the skin.
  • “The shampoo stopped working, so I need a stronger one.” Almost always it was stopped, or rinsed out immediately rather than left on. Check contact time and frequency first. If both are right, rotate to a different active ingredient rather than a stronger one.
  • “Once it clears, I am done.” It is controlled, not cured. Treatment clears it in a week or two and it returns within weeks to months once you stop. Maintenance once or twice a week is the normal plan, not a sign something went wrong.
  • “Cradle cap means my baby has eczema, or that I did something wrong.” Neither. Cradle cap is common, does not itch or bother most babies, is not caused by anything a parent did, and clears on its own during the first year.

Questions Patients Ask

+

Is dandruff the same thing as seborrheic dermatitis?

The same process at different intensities. Dandruff is the mild end - flaking and itch with little visible inflammation. Seborrheic dermatitis is the fuller version, with inflamed, discolored skin and greasy scale, and it can involve the face, ears and chest too. The same treatments work for both, and many people move between them over the years.

Will it ever go away for good?

The infant version clears on its own, almost always within the first year. The adult version is long term. It is very treatable, and most people keep it more or less invisible with a once or twice weekly routine, but controlled is not cured. It fluctuates with season, stress and general health, so quiet spells are normal and not proof it has gone.

Does washing my hair more often help or make it worse?

For most people it helps, because washing removes the oil and scale the yeast uses. That does not suit every hair type, and frequent washing of textured or treated hair can do real damage. If two or three times a week is not realistic, ask for a leave-on antifungal foam, lotion or cream, or apply the shampoo to the scalp in sections without lathering the length. The plan should fit your hair.

Is the yeast an infection? Should I be worried about spreading it?

No, on both counts. Malassezia lives on the skin of essentially every adult as a normal resident. Seborrheic dermatitis is your immune system reacting to that normal resident, not an infection you caught, and nobody can catch it from you.

Can it cause hair loss?

It does not destroy hair follicles or cause permanent hair loss. Severe inflammation and persistent scratching can cause temporary shedding, which recovers once the scalp settles. Hair lost in a defined pattern, or a scarring scalp with smooth bald patches, is a different problem and worth having looked at.

Why does my face flake right where I use my skincare?

Because the creases beside the nose and the eyebrows are where seborrheic dermatitis lives, and it is easy to read that as your products drying you out. More moisturizer will not shift it, and acids and scrubs make it worse. The test is simple - an antifungal cream a few times a week there usually improves it within two weeks.

References

+