Condition

Jock Itch

Jock itch is a fungal infection of the skin in the groin. It causes an itchy, scaly rash that spreads out from the crease onto the inner thigh. It is usually the same fungus that causes athlete's foot, it clears with antifungal creams from a pharmacy, and it tends to come back if the feet are not treated too.
Dr. Schwarz, MD · Board-certified dermatologistLast reviewed September 8, 2026

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Two things come up in almost every one of these appointments. The first is where it came from - not sex, not hygiene, but nearly always the same fungus already on the person's own feet, carried up by a towel, by hands, or by underwear pulled on over infected feet. The second is the cream, because the widely prescribed combination of antifungal plus strong steroid takes the itch away in a day and lets the fungus spread underneath, and weeks of a strong steroid on thin groin skin can cause permanent stretch marks. The plan I actually use is unglamorous - a plain antifungal cream twice a day, kept up for a week or two after the rash looks gone, treat the feet at the same time, socks before underwear.

— Dr. Schwarz, Board Certified Dermatologist

Key Facts

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How commonCommon, and one of the most frequent reasons an adult is given an antifungal cream
Who gets itFar more common in men than in women, and mainly in adolescents and adults. More common in athletes, in people who sweat heavily, in hot climates, in people carrying extra weight, and in people with diabetes. Unusual before puberty
Curable or managedCurable. Recurrence is common if the feet or the conditions in the fold are not dealt with
Prescription neededUsually not. Over-the-counter antifungal creams clear most cases
Time to improveItching usually settles within a few days. The skin takes two to four weeks

What It Is

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Jock itch is a fungal infection of the outer layer of groin skin, from the same family of fungi behind athlete's foot and ringworm. Its medical name is tinea cruris. The fungi feed on keratin in the dead surface layer, so it stays on the surface - uncomfortable and persistent rather than dangerous.

It starts in the crease where the thigh meets the body and fans onto the inner thigh in a half-moon shape. The advancing outer edge is the active part - raised, scaly, clearly defined, sometimes with small bumps or pustules along it. Inside that edge the skin is flatter and less scaly, which gives ringworm its name. It itches, sometimes intensely, and burns where skin is rubbed raw.

It is often on both sides but not symmetrically, and can reach the buttocks and lower abdomen. In men it characteristically spares the scrotum and penis, the most useful clue there is, because a candida yeast infection does involve the scrotum and throws small separate spots beyond its edge. Women get it too, less often, mistaken for irritation or eczema in the fold.

It is not a sexually transmitted infection and not caused by being unclean. Usually it is the person's own athlete's foot, moved upward.

Symptoms

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A red edge in the groin crease

Ring-Shaped Rash

A red or brown rash in the groin fold with a raised, scaly, sharply defined edge that spreads outward onto the inner thigh. The center often looks clearer than the border. The scrotum is usually spared, which helps tell it apart from other rashes.
Sore in the folds

Itchy and Burning

Intense itch and burning where skin rubs, worse with heat, sweat and tight clothing. Scratching thickens the skin and blurs the rash's edge. Steroid creams used alone often make it spread.
Coming from elsewhere

With Foot or Nail Fungus

Groin rash alongside athlete's foot or fungal nails, because the same fungus travels from the feet, often on underwear pulled up over them. Treating only the groin means it comes back. Both areas are treated together.

How It Looks by Skin Tone

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A rash spreading from a groin crease onto the inner thigh on light skin. The advancing edge is raised, scaly and clearly red, and the center is flatter and paler.A rash spreading from a groin crease onto the inner thigh on medium olive-toned skin. The advancing edge is raised and scaly and reads dusky pink to tan, with a flatter center.A rash spreading from a groin crease onto the inner thigh on brown skin. The advancing edge is raised, scaly and violet-brown rather than red, and the center is flatter and darker than the surrounding skin.A rash spreading from a groin crease onto the inner thigh on deep brown skin. The advancing edge is raised and scaly and barely differs in color from the skin beside it, with a flat darker patch inside the ring where the rash has settled.
LightMediumBrownDeep

On deeper skin tones the rash is often not red. The active edge may look brown, gray, violet or just darker than the skin beside it, and the flat center may look darker rather than clearer. Because everyone learns to look for a red ring, this gets dismissed as chafing and treated for months as a friction problem before anyone scrapes it.

Texture is the clue that still works. Run a finger across it - a raised, scaly, clearly defined edge you can feel, with normal skin beyond it. Chafing has no edge like that. The bigger issue is what it leaves behind. Inflammation in the groin fold on deeper skin tones very often heals into a flat darker patch, post-inflammatory hyperpigmentation, which here can last many months and bother people more than the rash did. It is a mark, not remaining infection. So months of antifungal cream will not lift it, and skin-lightening creams sold for the groin, many containing undisclosed strong steroids, do real harm to thin fold skin. If the darkness bothers you, ask a dermatologist rather than buying something, because the mark fades once the inflammation is gone.

Where It Shows Up

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Front view of a whole body with red marks in both groin creases, across the hips and down both inner thighs. The rest of the body is clear.
The groin creases and inner thighs
It sits in the crease where the thigh meets the body and spreads down the inner thigh with a raised, scaly edge. It usually leaves the scrotum alone, which is one of the things that separates it from a yeast rash. Check the feet at the same time — jock itch often comes from athlete's foot carried up on underwear.
Back view of a whole body with red marks on both buttocks and in the crease between them. The rest of the body is clear.
Buttocks and the crease
It can spread back onto the buttocks and the crease between them, especially in hot weather or under damp clothing.

What Happens in the Skin

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

How Jock Itch happens
Skin basics
BARRIEREPIDERMISDERMIS0NORMAL SKIN IN THE FOLD1HEAT, SWEAT AND RUBBING2THE FUNGUS GROWS3AN ITCHY PATCH WITH A RAISED EDGE

Skin in the groin fold sits against itself, so it is naturally warmer and damper than skin elsewhere.

Exercise, tight clothing and hot weather keep the fold wet, and rubbing wears the barrier thin.

The same dermatophytes, usually carried up from the feet on a towel or a pair of shorts. They spread through the dead outer layer of the fold.

It clears in the middle and advances at the rim, which is what gives the ring-shaped border. Treating the feet at the same time is what stops it coming back.

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.

The fungi are dermatophytes, most often Trichophyton rubrum and sometimes Epidermophyton floccosum. They feed on keratin in the dead outer layer of skin and grow best warm, damp and enclosed. The groin is the best such place on the body.

They have to arrive from somewhere, and the commonest source by a wide margin is the person's own feet. Athlete's foot and fungal toenails supply a steady quantity, and it reaches the groin three ways - the same towel on feet then groin, scratching feet then groin, and pulling underwear over infected feet. That last one is why the advice is socks before underwear.

It also spreads through shared towels, clothing and bedding, and occasionally close skin contact. None of that is needed when the fungus is already on the feet.

Then the fold does the rest. Sweat, heat, friction between thigh and body, and clothing that keeps air out soften the skin surface, and softened, rubbed skin is much easier for the fungus to establish in. That is why it is more common in athletes, in hot humid weather, in heavy sweaters and in people with deeper folds.

Susceptibility matters too. Some people, apparently for inherited reasons, respond weakly to Trichophyton rubrum and get this and athlete's foot repeatedly, while others in the same household never do.

Risk Factors

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Most of what raises the risk is heat, moisture and already having the fungus somewhere else.

Existing fungus
Athlete's foot or fungal toenails
The strongest and most fixable risk factor. Most jock itch is the person's own foot fungus relocated.
Existing fungus
A previous episode
Some people get this repeatedly for years. A pattern, not a failure.
Existing fungus
Sharing towels, clothing or bedding
A straightforward route between people at home.
Heat & moisture
Heat and humidity
Far more common in summer and hot climates, and a known problem for people who work in heat or protective clothing.
Heat & moisture
Sweating and sport
Long sessions, damp kit after exercise, gear that traps heat.
Heat & moisture
Tight or non-breathable clothing
Synthetic underwear, compression shorts, wet swimwear left on.
Heat & moisture
Carrying extra weight
Deeper folds hold more heat and moisture and rub more.
Age & sex
Being male
Substantially more common in men - anatomy, sweating and sport.
Age & sex
Adolescence and adult life
Rare in young children, common from puberty onward.
Other health conditions
Diabetes
More common, more extensive and slower to clear. Worth treating properly.
Other health conditions
A suppressed immune system
More widespread, more stubborn, more likely to need tablets.

Course

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Jock itch does not clear on its own. Untreated it creeps - further onto the thigh each month, sometimes onto the buttocks or lower abdomen - flaring in heat and quietening in cold. Treated properly it settles quickly; the timeline below is treatment.

First few days of treatmentThe itch eases
The itch goes before the rash does

The itch eases within a few days, well before the skin looks different.

Weeks two to fourThe rash clears
The edge is the last part to go

The rash clears over two to four weeks. The edge goes last and is the part to keep treating.

A week or two after it looks clearWhen it is safe to stop
Keep going past the point it looks better

Stopping when the rash looks clear, rather than a week or two later, is the most common reason it comes straight back.

After stoppingRecurrence is common
Two reasons it returns

The first is untreated athlete's foot, delivering a fresh supply every time you get dressed. The second is that nothing about the fold has changed.

If a steroid cream is usedThe course that goes badly
Relief first, then a rash that is hard to recognize

A steroid cream, or a combination steroid-and-antifungal, kills the itch and suppresses the immune response holding the fungus in check. The rash spreads, loses its edge and becomes hard to recognize - dermatologists call this tinea incognito. Long use of a strong steroid on groin skin also causes permanent stretch marks and thinning. These take longer to sort out and often need a scraping.

What Makes It Better & Worse

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Jock itch is not one problem, it is four — heat and sweat in the fold, a damaged barrier, the fungus growing, and reinfection from your own feet, towels and clothing. It comes back usually not because of the cream: if the feet are the source, no cream on the groin settles it.

What is driving yours?

FATBARRIEREPIDERMISDERMIS

Exercise, tight clothing and hot weather keep the fold wet, and rubbing wears the barrier thin.

The same dermatophytes, usually carried up from the feet on a towel or a pair of shorts. They spread through the dead outer layer of the fold.

The same dermatophytes, usually carried up from the feet on a towel or a pair of shorts. They spread through the dead outer layer of the fold.

What helps

  • Dry the fold properly, before the feet Pat, do not rub, let it air.
  • Loose cotton underwear, changed daily And again after exercise.
  • Get out of damp kit and wet swimwear Shower, dry, change.
  • A plain, unfragranced drying powder Keeps it dry, clears nothing.

What makes it worse

  • Staying in damp kit after exercise A warm, wet fold for hours.
  • Tight, non-breathable underwear Holds heat and sweat against skin.
  • Hot, humid weather Cases cluster in summer and humid climates.
  • Deep folds and skin rubbing on skin More heat, moisture, friction.
  • Wet swimwear left on for hours Same as damp kit, a summer classic.

What helps

  • A very short course of a mild steroid Ask only if the itch is unbearable.

What makes it worse

  • Scratching Breaks the skin and spreads the fungus.
  • Harsh soaps, sprays and scrubbing They irritate inflamed skin.

What helps

  • Terbinafine cream The shortest course, about one to two weeks.
  • Azole creams Clotrimazole, miconazole or ketoconazole, over a few weeks.
  • Treat beyond the visible edge About an inch - the fungus extends past it.
  • Keep going after it looks clear One to two weeks more.
  • Antifungal tablets For extensive or returning infection — ask your doctor if you are pregnant.

What makes it worse

  • Combination steroid-antifungal creams The steroid lets the fungus spread.
  • A steroid cream on its own The same problem without the antifungal.
  • Stopping the cream when the itch stops The itch goes long before the fungus.

What helps

  • Treat your feet at the same time Otherwise the source is still there.
  • Socks before underwear No dragging over infected feet.
  • Wash towels, underwear and bedding hot Less fungus at home.

What makes it worse

  • Putting underwear on before socks It drags fungus from feet to groin.
  • Ignoring your feet Athlete's foot and toenails are the usual source.
  • Sharing towels Or one towel for feet and groin.

How These Treatments Work

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

Pick a treatment
Skin basics
BARRIEREPIDERMISDERMISKILLS THE FUNGUSTAKES AWAY ITS CONDITIONSSTOPS REINFECTIONKILLS THE FUNGUS

Two to four weeks, and past the point where it looks clear.

Sweat and friction under clothing are what let it start.

It usually travels up from athlete's foot, often on underwear pulled on over the feet.

For stubborn or widespread cases.

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

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Everything here you can buy without seeing anyone.

Keep the fold dry and cool
Keep the fold dry and cool
Always
No cream holds if the fold spends the day warm and damp. Get out of damp kit and wet swimwear rather than waiting until you are home, pat the fold dry before you dry your feet, let it air for a minute, and wear loose cotton underwear changed daily and again after exercise. This is also most of what stops the next episode.
16:9 hero for Terbinafine. Never cropped: the tone strip and the corner logo depend on the full frame.
Terbinafine cream
Strong evidence
Usually the fastest option here, about one to two weeks twice a day, because it kills the fungus rather than only stopping it growing. Take it an inch beyond the edge you can see, since the fungus reaches further than the rash does. Keep going for a week after it looks clear — stopping at the point it looks better is the single most common reason it comes straight back.
16:9 hero for Athlete's Foot. Never cropped: the tone strip and the corner logo depend on the full frame.
Treat athlete's foot at the same time
Strong evidence
Most jock itch is the person's own foot fungus relocated, so treating the groin alone means the feet resupply it every time you get dressed. Use the same antifungal cream between the toes and over the soles for the full course, put socks on before underwear, and use a separate towel on your feet. If the toenails are thick and discolored, that is a longer job worth raising with a doctor.
A white cream tube lying on its side on a white background, with a plain white label reading Antifungal Cream and a yellow swoosh beneath it.
Clotrimazole or miconazole cream
Strong evidence
The azole creams, and the ones most pharmacies stock. They work as reliably as terbinafine for jock itch but usually need two to four weeks rather than one to two. Same rules: twice a day, an inch past the edge, and carry on for one to two weeks after it looks clear.
Antifungal powder
Antifungal powder
Limited evidence
A plain unfragranced drying powder keeps the fold less hospitable and is genuinely useful for preventing the next episode, particularly in hot weather or heavy training. It is not a treatment for a rash that is already there, and using it instead of a cream is how a small patch becomes a large one.
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
It has some antifungal activity in the laboratory, and it is often suggested for this. It has not been shown to clear tinea in the groin, it takes far longer than a proper antifungal even where it helps, and undiluted it irritates thin fold skin. Since a cream that works costs very little, this is not the place to experiment.
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.
Never use
On its own it is the wrong treatment. It takes the itch away in a day and suppresses the response that was holding the fungus in check, so the rash spreads and loses the clear edge that makes it recognizable. The same goes for combination steroid-antifungal creams. If the itch is genuinely unbearable, ask a doctor, who may add a mild steroid for a few days alongside a real antifungal as a deliberate short-term decision.

Prescriptions

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These need a prescription.

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 prescription-strength azole cream, used once or twice a day for two to four weeks. It is the usual next step when a pharmacy cream has not cleared it, or when the rash is wide. It carries the same rule as the others: treat past the visible edge, and keep going after the skin looks normal.
A white cream tube lying on its side on a white background, with a plain white label reading Ciclopirox and a blue swoosh beneath it.
Ciclopirox cream
Moderate evidence
A different class of antifungal, useful when azole creams have irritated the skin or have not worked. It covers yeast as well as dermatophytes, which helps when it is not certain which of the two is in the fold. It usually needs a full four weeks.
A white cream tube lying on its side on a white background, with a plain white label reading Steroid + Antifungal and a blue swoosh beneath it.
Combination steroid-antifungal cream
Never use
Widely prescribed for groin rashes and a common reason a straightforward one becomes stubborn. The steroid relieves the itch within a day and lets the fungus spread underneath, so the rash widens, fades and loses its edge. Used for weeks on thin groin skin it can also leave permanent stretch marks. A plain antifungal is the better choice here.
16:9 hero for Terbinafine. Never cropped: the tone strip and the corner logo depend on the full frame.
Terbinafine tablets
Strong evidence
Tablets for one to two weeks, used when the rash is extensive, has failed creams, or keeps returning within weeks of clearing. They reach fungus in areas a cream cannot cover reliably, including the feet and nails supplying it. Liver blood tests are sometimes checked first, and it interacts with a number of other medicines, so the full list matters. Ask your doctor if you are pregnant or breastfeeding.
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
Strong evidence
A one to two week course, and the usual alternative when terbinafine does not suit. It works equally well for jock itch. It interacts with many common medicines, including some heart and cholesterol drugs, so your doctor will go through everything you take. Ask your doctor if you are pregnant or breastfeeding.
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
Moderate evidence
A once-weekly tablet for two to four weeks, sometimes chosen because the schedule is easy to keep to. It works for jock itch but is generally a little less effective against these fungi than terbinafine or itraconazole. It is the more useful option when yeast is also in the picture. Ask your doctor if you are pregnant or breastfeeding.

Procedures

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

No procedures listed yet.

When to See a Dermatologist

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Most jock itch does not need an appointment, because an over-the-counter antifungal cream twice a day, continued past the point the rash looks clear, handles the ordinary version. Book if three to four weeks of proper treatment has not helped, if the rash spreads despite treatment, if it is weeping, crusting, blistering or intensely painful, if it involves the scrotum or penis, if it returns within weeks, or if you have used a steroid or combination cream, and go earlier with diabetes or a suppressed immune system. Two things change the result - antifungal cream makes a scraping read negative even when infection is present, so stop it a week or two before the visit, and a rash already treated with a steroid often cannot be identified by eye. Diagnosis is usually by eye, with a scraping when treatment fails, so do not keep treating an unresponsive rash on your own.

— Dr. Schwarz, Board Certified Dermatologist

Complications

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A rash changed by steroid cream

A steroid cream, or a combination steroid-and-antifungal cream, takes the itch away in a day and lets the fungus spread underneath. The rash gets wider, loses its clear edge and becomes faint and hard to recognize, a state called tinea incognito. Rashes that have been through this take longer to sort out and often need a scraping to work out what is underneath. It is the single most common way a simple groin rash becomes a complicated one.

Stretch marks and thinned skin

Groin skin is thin, and weeks of a strong steroid cream on it can leave permanent stretch marks, thinning and visible small blood vessels. This is why a strong steroid, or a combination steroid-antifungal cream, is not the right treatment for a fungal rash in a fold. Unlike the rash, these changes do not go away once the cream stops.

Infection from scratching

Scratching a groin rash breaks the skin and lets bacteria in, so the area can become weepy, crusted, hot and much more painful than an ordinary fungal rash. It needs an antibiotic as well as the antifungal, and if redness is spreading outward with a fever it should be seen the same day. Keeping the nails short and treating the itch properly is what prevents it.

Lookalikes

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Psoriasis

Psoriasis in a body fold, called inverse psoriasis, sits in exactly the same crease and is regularly treated as jock itch for months. It is smooth and shiny rather than scaly, because the damp fold rubs the scale away, and its border is sharp all the way round rather than being most active at the outer edge. It does not respond to antifungal cream, and there are usually clues elsewhere: nail pitting, or plaques on the elbows, knees or scalp.

Contact Dermatitis

A reaction to underwear elastic, a laundry detergent, a wipe or a fragranced spray produces an itchy rash in the same place. The giveaway is the shape: it follows whatever touched the skin, so it traces a waistband or a leg seam rather than fanning out of the crease. It also has no raised scaly advancing edge, and it settles when the product stops rather than when an antifungal starts.

Seborrheic Dermatitis

Seborrheic dermatitis also settles in the groin crease and also flakes, so it gets treated as jock itch. Its scale is greasy and yellowish rather than dry and white, it stays in the crease instead of fanning onto the thigh, and it has a soft ill-defined border rather than a raised edge you can feel. Most people who have it in the fold also have it in the scalp, eyebrows or the creases beside the nose.

Myths

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  • “It is a sexually transmitted infection.” It is not. It is the same fungus that causes athlete's foot and ringworm, and usually it came from the person's own feet. It can pass through close contact or shared towels, but it is not an STI.
  • “It means I am not washing properly.” It does not. The fungus needs warmth, moisture and keratin, all of which a groin fold has however often it is washed. Washing harder, especially with antibacterial soaps, makes it worse by damaging skin.
  • “Only men get it.” Men get it far more often, but women get it too, where it is more often dismissed as chafing, irritation or eczema - which delays treatment.
  • “Only athletes get it.” The name comes from where it was noticed, not who is at risk. Heat, sweat and enclosed clothing are the requirements, and plenty of non-athletes meet them.
  • “The rash looks gone, so I can stop the cream.” The most common reason it comes back. The rash clears well before the fungus does. Keep treating one to two weeks past that point.
  • “Powder will clear it.” Drying powders make the fold less hospitable and help prevent the next episode. They do not treat an established infection.
  • “The dark patch left behind means it is still infected.” Usually the opposite. Once the scaling and itching have gone, flat darker skin is a mark left by inflammation, and it fades over months. Antifungal cream will not speed that, and skin-lightening products here do real damage.

Questions Patients Ask

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Is jock itch a sexually transmitted infection?

No. It is a skin fungus, the same one that causes athlete's foot and ringworm, and usually it came from the person's own feet. It has nothing to do with sexual activity.

Can I give it to my partner?

Possible but not common. It spreads through prolonged skin contact and shared towels, clothing and bedding. Your own towel, hot washes and proper treatment reduce that to very little. No need to avoid your partner during treatment.

Why does it keep coming back?

Three usual reasons. You stopped the cream when the rash looked clear instead of one to two weeks later. Your feet keep resupplying it, particularly if the toenails are involved. Or the fold spends the day warm and damp. Working through those three beats switching antifungals.

Can I use hydrocortisone on it?

On its own, no. Steroids relieve the itch and let the fungus spread, and groin skin is thin enough that weeks of a strong steroid can leave permanent stretch marks. The same goes for combination steroid-antifungal creams, a common reason a simple rash becomes a complicated one. If the itch is unbearable, ask a doctor - they may add a mild steroid for a few days alongside the antifungal, as a short-term measure.

Should I shave the area?

It makes no difference to the infection, and shaving inflamed skin adds cuts, irritation and a risk of bacterial infection. If you normally shave, leave it until the rash has settled.

Why is the skin still darker after the rash cleared?

Inflammation in a skin fold commonly leaves a flat darker mark, especially on deeper skin tones, and it can take many months to fade. With no scaling and no itching, the infection is gone and what remains is a mark. Antifungal cream will not lift it, and skin-lightening creams sold for the groin often contain strong steroids that harm thin skin.

References

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