Adapalene
Strong evidenceThe strongest thing you can buy without a prescription, and the best first move for most acne. It unclogs pores before they inflame, which is why it prevents spots rather than treating them.
Acne vs Keratosis Pilaris
Keratosis pilaris is the patch of small rough bumps on the upper arms, thighs and cheeks that most people know as chicken skin. It is harmless, it is not an infection or an allergy, and it can be smoothed considerably if the texture bothers you.
Key differences
The same eight facts on every condition comparison.
Usual age
Teens to mid-20s
Childhood and teens
Where
Face, chest, back
Upper arms, thighs, cheeks
Main sign
Clogged pores and spots
Rough, tiny bumps like goosebumps
Itch or pain
Spots can be sore
No
Contagious
No
No
Long term
Controlled; often outgrown
Often fades in adulthood
Scars
Can scar
No
Who gets it
Most teens; some adults
Dry or eczema-prone skin
What is it?
Acne
Keratosis Pilaris
What is it?
It starts in the follicle.
Acne affects the hair follicle and its oil gland.
Spots take several forms.
Plugs form blackheads or whiteheads; inflammation forms pimples and deeper lumps.
It is not about dirt.
Bacteria are only one part of the process.
Tests are rarely needed.
An unusual pattern or hormonal symptoms may call for assessment.
Overview
Oil and dead skin cells block hair follicles. This can cause blackheads, whiteheads, pimples, or deeper painful lumps.
It causes rough bumps.
Small plugs form around hair follicles.
It has typical sites.
It often affects the upper arms and thighs, and sometimes the cheeks.
It is not acne.
It is not caused by dirt.
Inflammation is a different issue.
Pain, pustules, scarring or an unusual pattern suggest another condition.
What it looks like
Acne
Comedonal acne Mostly blackheads and whiteheads.
Inflammatory acne Red papules and pustules.
Nodulocystic acne Deep painful lumps that can scar.
Hormonal acne Breakouts along the jaw and chin.
Body acne On the chest, back and shoulders.
Keratosis Pilaris
Classic keratosis pilaris Rough skin-colored bumps.
Red keratosis pilaris Bumps with redness around them.
Facial keratosis pilaris Redness and bumps on the cheeks.
Skin tones
Diagram
In the skin
Oil and shed skin cells can block a hair follicle, changing the environment inside the pore. Bacterial activity and the immune response contribute to inflammation, swelling and tender spots.
Keratin builds up at the openings of small hair follicles. These plugs create rough bumps, sometimes with surrounding inflammation or darker marks.
Where it shows up
Face, chest and upper back
Outer upper arms and thighs
When it usually starts
010203040506070+
Acne. Acne Often in teens Often begins in the teen years; acne can continue or first appear in adulthood.
Keratosis Pilaris. Often begins in childhood and becomes more noticeable during adolescence.
Causes and triggers
Causes
Acne forms when oil and dead skin cells clog pores, acne bacteria grow inside them, and inflammation follows. Hormones that increase oil play a central role.
Oil and dead skin cells block hair follicles. Bacteria within the follicles and inflammation contribute to pimples and deeper spots. Hormonal changes can increase oil production.
Keratosis pilaris happens when keratin, a skin protein, builds up and plugs hair follicles. Each plug forms a small rough bump.
Family tendency
Acne often runs in families. A parent with severe acne raises the chance of severe acne.
Acne can run in families. A close relative with deep, painful acne increases the chance of developing that pattern.
It runs strongly in families and is often inherited from one parent.
Risk factors
Teen years, Family history, Polycystic ovary syndrome, Oily skin, Puberty, Hormonal changes
Children and teens, Eczema, Dry skin
Trigger
● Acne
● Keratosis Pilaris
Hormone changes around periods
Well established
Not listed
Heavy, pore-clogging products
Strong link
Not listed
Some medicines like steroids
Strong link
Not listed
Friction from masks, helmets or phones
Strong link
Not listed
High-sugar and dairy-heavy diets
Possible
Not listed
Stress
Possible
Not listed
Hormonal changes
Common trigger
Not listed
Pore-clogging products
Common trigger
Not listed
Sun exposure
Not a typical trigger
Not listed
Heat and sweating
Can contribute
Not listed
Alcohol
Not a typical trigger
Not listed
Spicy foods
Not a typical trigger
Not listed
Harsh skin care
Can contribute
Not listed
Friction and tight clothing
Can contribute
Not listed
Shaving or waxing
Not a typical trigger
Not listed
Poorly maintained hot tubs
Not a typical trigger
Not listed
Prolonged antibiotic use
Not a typical trigger
Not listed
Cold, dry weather
Not listed
Well established
Hot showers
Not listed
Possible
Harsh soaps
Not listed
Possible
Daily Care
Acne
Keratosis Pilaris
Daily care
Habits that help
- Strip the routine back
Use a gentle cleanser, moisturizer and sunscreen without unnecessary product layers. - Cut back on sugar and refined carbs
Helps a little, mostly in oily, hormonal acne. - Wear sunscreen daily
Stops dark marks from deepening.
Avoid
- Avoid: Picking and squeezing
The biggest cause of avoidable scars. - Avoid: Scrubbing and over-washing
Strips the barrier and pushes you off treatment. - Avoid: Adding more products
Avoid adding several irritating products at the same time. - Avoid: Heavy oil-based hair products
Cause stubborn small bumps along the hairline. - Avoid: Friction and trapped sweat
Straps and collars press oil into pores. - Avoid: Heat and humidity
Swell the pore lining and trap what is behind it. - Avoid: High-glycemic diet
Sugar and refined carbs raise the hormones driving oil. - Avoid: Skim milk and whey protein
Linked to acne more than other dairy, though weakly. - Avoid: Stress
Raises the hormones that worsen acne you already have. - Avoid: Stopping treatment once it works
Acne usually returns within two to three months.
Habits that help
- A plain thick moisturizer
Fragrance-free, twice a day, the part people skip. - Applying to damp skin
Within minutes of a shower, to trap water. - Short lukewarm showers
Under ten minutes, gentle non-foaming cleanser. - A humidifier in winter
Worth it if winter is dramatically worse. - A soft washcloth, gently
Light exfoliation while washing, not a scrub. - Sunscreen on exposed areas
Keeps the marks from darkening. - Leaving it alone
Harmless, and most of it settles with age. - Lactic acid or ammonium lactate
The same two jobs, gentler. - Glycolic acid
Loosens dead surface cells, but stings more easily. - Keep moisturizing during winter and indoor heating
Dry air firms the plugs and roughens the skin.
Avoid
- Avoid: Long hot showers
Hot water strips the oils that hold water in. - Avoid: Harsh soap
Foaming bars and scented washes leave skin tight. - Avoid: Scrubbing with a loofah
It cannot reach a plug inside the follicle. - Avoid: Picking at the bumps
Leaves a mark for months, and the plug refills. - Avoid: Dry shaving over the area
The razor catches bumps and causes ingrown hairs. - Avoid: Skipping moisturizer
The most common reason treatment fails. - Avoid: Heavily fragranced lotions
Fragrance adds redness, not moisture. - Avoid: Judging it too early
Real change takes four to six weeks. - Avoid: Stopping once it clears
The bumps return within a few weeks.
Treatment differences
Evidence labels come from each condition’s own treatment list.
Treatment
● Acne
● Keratosis Pilaris
Filter by type
Over-the-counter
Benzoyl Peroxide
Strong evidenceKills the bacteria involved in inflamed spots, and is the one thing that stops acne bacteria becoming resistant to antibiotics. Lower strengths work about as well as higher ones and sting less. It bleaches towels and pillowcases.
Azelaic Acid
Moderate evidenceWorks on the spot and the mark it leaves at the same time, which makes it useful on deeper skin tones. It is also one of the few acne treatments considered safe in pregnancy.
Salicylic Acid
Moderate evidenceGets inside the pore and loosens the plug, so it suits blackheads and whiteheads more than deep spots. Gentler than a retinoid, and weaker than one.
Niacinamide
Limited evidenceSold heavily for acne, and the evidence for clearing spots is thin. It is genuinely useful for the marks left behind and for tolerating stronger actives - just not as the treatment itself.
Sulfur
Limited evidenceAn old treatment, usually a mask or a spot dab, that dries the surface of a spot and mildly loosens plugs. It is gentle enough for skin that cannot tolerate benzoyl peroxide or a retinoid. It smells, and it is weaker than everything above it on this list.
Tea Tree Oil
Limited evidenceA 5 percent gel reduces inflamed spots in small studies, more slowly than benzoyl peroxide does. Neat oil straight from the bottle is a common cause of an itchy rash, so buy it already diluted. It is a reasonable extra rather than something to build a routine on.
Salicylic Acid
Limited evidenceOil-soluble, so it gets down inside the follicle and works on the plug from within rather than at the surface. Useful when the bumps are the main complaint and urea has not been enough. It is drying, so it needs pairing with a moisturizer, and it is not the one to reach for on a child's cheeks.
Body scrubs and loofahs
AvoidFriction cannot reach a plug sitting inside the follicle, so scrubbing removes surface skin without touching the cause. It adds redness, and on deeper skin tones it leaves dark marks that outlast the bumps by months. A soft washcloth used gently while washing is as far as this should go.
Urea
Moderate evidenceThe single most useful thing for keratosis pilaris, because it does both jobs at once: it holds water in the dry skin and it breaks down the keratin plug. Use 10 to 20 percent on the arms or thighs most days, on damp skin after a shower. It stings a little on cracked skin, and the bumps return within a few weeks of stopping.
Lactic Acid
Moderate evidenceAmmonium lactate or lactic acid lotion at around 12 percent does the same two jobs as urea, slightly more gently, and it is often the easier one to keep using daily. Good first choice if urea stings. Like everything here, it manages the bumps rather than ending them.
Glycolic Acid
Limited evidenceLoosens the dead cells stuck at the surface, which smooths the skin around the bumps. It is the most likely of the acids to sting and to leave the skin pink, so it suits the arms and thighs better than the cheeks. On deeper skin tones, build up slowly, because irritation is what leaves the dark marks.
Retinol
Limited evidenceChanges how the follicle sheds its cells, so fewer plugs form in the first place. It is slower than the acids and more irritating, so it is usually a second step rather than a first one. Start two nights a week on one arm, and always put a moisturizer over it.
Coconut Oil
Limited evidenceIt moisturizes, and moisture genuinely softens the texture a little, so it is not useless. It cannot dissolve a keratin plug, so it will not clear the bumps, and the widely shared claim that it cures keratosis pilaris is not supported. If you like it, use it as the moisturizer over an acid cream rather than instead of one.
Prescription topicals
Tretinoin
Strong evidenceThe most studied topical in acne. Stronger than adapalene and more irritating with it, so it is usually the step up rather than the starting point. Not used in pregnancy.
Aklief
Strong evidenceA newer retinoid, and the one specifically tested on chest and back acne rather than just the face. Useful when the trunk is the main problem. Expensive without coverage.
Clindamycin
Strong evidenceCalms inflamed spots, but should never be used on its own. Guidelines are explicit about this - alone it stops working within months as bacteria adapt, so it is always paired with benzoyl peroxide or a retinoid.
Tazarotene
Strong evidenceThe strongest of the prescription retinoids, and the step to take when tretinoin has stopped making a difference. It is particularly good on stubborn blackheads and whiteheads. It is also the most irritating of them, so it is usually started two or three nights a week. Not used in pregnancy.
Winlevi
Moderate evidenceBlocks the hormone signal that drives oil production, but only where you put it. It is the first hormonal option that works topically, and the only one that can be used by men as well as women.
Aczone
Moderate evidenceMild on the skin and tends to suit adult women with inflamed spots who cannot tolerate a retinoid. Applied at the same time as benzoyl peroxide it can temporarily stain skin orange, so space them apart.
Tretinoin
Limited evidenceThe prescription version of the retinoid idea: it normalizes how the follicle sheds, so plugs form more slowly. It is used when over-the-counter acids have not been enough after six weeks. It is drying and irritating on arms and thighs, so it is introduced two or three nights a week, and it makes the skin more sun-sensitive.
Tazarotene
Limited evidenceA stronger retinoid cream, occasionally used on stubborn arms when tretinoin has not worked. It is more effective on the plugs and also more irritating, which is the trade-off. It is not used in pregnancy — ask your doctor before starting it if that applies to you.
Hydrocortisone
Limited evidenceA mild steroid cream used in short courses when the red halo around the bumps is the main complaint, not the roughness. It calms the inflammation for a while and does nothing to the plugs. It is not a long-term answer, because weeks of steroid on thin skin like the cheeks causes its own problems.
Prescription pills
Doxycycline
Strong evidenceBrings widespread inflamed acne down quickly, and is meant to be used for three to four months, not indefinitely. Always alongside a topical, which is what carries on once the tablets stop.
Accutane
Strong evidenceThe only acne treatment that often produces lasting clearance after the course ends. What it costs you is months of dry lips and skin, blood tests, and strict pregnancy prevention. For acne that scars, that trade is usually worth making early rather than late.
Spironolactone
Moderate evidenceFor the pattern rather than the individual spot - deep jawline acne in adult women that flares with the cycle. It works slowly, over three to six months, and can be continued long term. Not used in pregnancy.
Birth Control Pills
Moderate evidenceLowers the hormone signal driving oil production across the whole body, so it suits acne on the chest and back as well as the face. Takes about three months to show, and carries a small clot risk that needs weighing up.
Minocycline
Moderate evidenceAnother tetracycline antibiotic for widespread inflamed acne, used the same way as doxycycline: three to four months, always alongside a topical. It is usually kept as the second choice, because it carries rarer but more serious side effects, including a blue-gray skin discoloration with long use.
Seysara
Moderate evidenceA narrow-spectrum antibiotic designed specifically for acne, so it disturbs gut bacteria less than doxycycline. One tablet a day, still meant for three to four months and still alongside a topical. It works about as well rather than better, and it is considerably more expensive.
None listed
Injections
Cortisone Injection
Limited evidenceDeals with one stubborn painful lump, not the condition. It settles in a day or two and is the safe alternative to squeezing it. It does nothing to prevent the next one.
None listed
Procedures
Comedone Extraction
Limited evidenceClears blackheads that are already there, quickly and visibly. It does not stop new ones forming, so it is an add-on to a retinoid rather than a substitute for one.
Chemical Peel
Limited evidenceModest benefit for clogged pores and a better one for the dark marks left behind. Needs repeat sessions, and the benefit fades if the daily treatment stops.
1726 nm Laser
Limited evidenceHeats the oil glands themselves, which is a genuinely different approach from everything else on this page. Trial results out to about six months are good, it works across skin tones, and it is expensive and rarely covered. Long-term data is still limited.
Photodynamic Therapy
Limited evidenceCan help stubborn inflamed acne, but the protocols vary widely between clinics, the downtime is real, and the evidence is not strong enough to put it ahead of the options above.
Blue Light Therapy
Limited evidenceBlue light kills acne bacteria at the surface, so a course can quiet mild inflamed spots for a while. The effect fades within weeks of stopping, and it does nothing for blackheads or deep lumps. In-clinic courses cost far more than a topical that would do more.
Chemical Peel
Limited evidenceA stronger version of the acid creams, applied in a clinic to the arms or cheeks. It can smooth the texture for a while, and the effect fades in the same way, so the daily cream is still needed afterwards. It is an add-on for people who want a faster start, not a replacement for the routine.
V-Beam
Limited evidenceAimed at the redness rather than the texture, so it is for the variant where the background color bothers you more than the bumps. Several sessions are usually needed and the bumps themselves are left much as they were. On deeper skin tones it is less useful and carries more risk of pigment change, so it is not usually the first suggestion.
Laser Hair Removal
Limited evidenceRemoving the hair takes away the thing that gets trapped under the plug, and small studies show the bumps and roughness improve with it. It is expensive for a harmless condition, which is why it is rarely the first plan. It makes most sense for someone already having the area treated for hair.
Microdermabrasion
AvoidSanding the surface has the same problem as a body scrub: the plug sits inside the follicle, below where it reaches. Any smoothness is short-lived, and it adds redness. On deeper skin tones the irritation can leave dark marks, so it is one to skip.
Outlook
Long term
Acne is usually controlled rather than permanently cured. Treatment reduces new breakouts, but improvement takes time and maintenance may be needed. Deep or scarring acne deserves early assessment because existing scars may remain after the active spots settle.
Keratosis pilaris has a season. Cold, dry months and indoor heating make it rougher and more visible, and humid summers often flatten it without treatment. People often credit a product for a change the weather made. Underneath that, it follows a slow arc from childhood.
Complications
Possible complications
- Dark marks
- Redness
- Scars
- Depression and anxiety
- Family conflict
- Social impact
More details
Dark marks
Flat brown or violet patches left where a spot was. They are not scars and they do fade, but it commonly takes 6 - 12 months, and sun exposure makes them last longer. These WILL FADE with time.
Redness
Flat pink or red marks left where a spot was, most often on lighter skin. Also not scars. They usually settle on their own, though it can take several months. These WILL FADE with time.
Scars
Permanent dents, pits or raised bumps left where inflammation broke down the skin's structure. Once formed, they can only be improved by procedures. These WILL NOT FADE with time.
Depression and anxiety
Acne can affect self-esteem, confidence and mental health. The link is consistent, and it does not track with how severe the acne looks to anyone else - which is itself a reason to treat it.
Family conflict
This is very common. Acne visits involving a teenager and a parent can sometimes be challenging, particularly when there is ongoing conflict about acne care.
Social impact
People may avoid photos, dating, social situations or activities because of their skin.
Keratosis pilaris often accompanies dry skin or an eczema tendency. Some variants leave persistent redness, pigment change or, less commonly, localised scarring.
When to get help
When to get help
Seek help for painful deep spots, scarring, persistent breakouts, or an uncertain diagnosis. Earlier treatment can reduce the chance of more scars.
Do not assume eye symptoms are part of acne. They need their own assessment.
Seek assessment if bumps are painful, very inflamed or unlike the usual rough follicular pattern. Gentle treatment can reduce roughness without scrubbing.
Common questions
Acne:Does acne ever go away?
For most people it settles by the mid-twenties. About one in six women still has it into her 30s and 40s, and it can return after pregnancy, after stopping the pill, or with any hormone shift. Controlled rather than cured.
Acne:Does what I eat cause acne?
Less than the internet suggests. The evidence points at high-glycemic diets - sugar and refined carbohydrate - and, less consistently, at skim milk. Chocolate and greasy food never held up, and no diet replaces treating the skin.
Acne:Why does my skin get worse when I start a new treatment?
That is purging. Retinoids speed up clogs already forming under the surface, so weeks of spots arrive at once. It peaks around weeks two to six and settles by week eight. Still worsening past 10 to 12 weeks is irritation, not purging.
Acne:Is it ever okay to pop a spot?
No. Squeezing pushes the contents sideways into surrounding skin, turning a spot that would have gone in days into a mark that lasts months, or a scar that lasts forever. A large, painful lump can be injected in clinic instead, and settles in a day or two.
Acne:Do I need antibiotics?
Sometimes, but never alone and never for long. They go alongside benzoyl peroxide or a retinoid, usually for three to four months, then stop while the topical carries on. Alone or indefinitely, they stop working and drive resistance.
Acne:Is my acne hormonal?
Almost all acne is hormonal - hormones drive oil production. The label only matters if it changes treatment: deep spots along the jawline and lower face in an adult woman, flaring before periods, usually respond better to hormonal treatment than to antibiotics.
Keratosis Pilaris:Will it ever go away?
For most people it fades substantially through the twenties and thirties with nothing done. A minority keep it for life. Treatment does not speed that up, it keeps the skin smooth meanwhile.
Keratosis Pilaris:Why does it come back when I stop the cream?
The tendency to plug the follicle is genetic, and the cream only clears plugs that have already formed. Within a few weeks of stopping, new ones build. That is the condition behaving normally, not the product failing.
Keratosis Pilaris:Is it caused by something I'm eating?
No. No food causes it and no diet clears it. It is inherited and tied to dry skin, not nutrition. The vitamin deficiency story is a myth.
Keratosis Pilaris:Can I exfoliate it away?
Not with friction. The plug sits inside the follicle where a scrub cannot reach, and scrubbing adds redness and, on deeper skin tones, dark marks. Urea, lactic acid and salicylic acid do reach it.
Keratosis Pilaris:Why is it worse in winter?
Cold air outside and heated air inside both dry the skin, and dry skin plugs its follicles more readily. Most people find it flattens in humid summer months. Shorter, cooler showers and daily moisturizer take the edge off.
Keratosis Pilaris:My bumps are red rather than rough. Is that different?
That is keratosis pilaris rubra, the same condition with more inflammation around each follicle. Creams help the texture more than the redness, so if redness is your main complaint see a dermatologist, who has options aimed at it.
Sources