What it is
It shows as greasy scale, itch and redness — and on deeper skin very often as pale rings or patches instead of redness, which is why it is regularly mistaken for vitiligo or a fungal infection. It is treated with medicated shampoos and antifungal and anti-inflammatory topicals, followed by a maintenance plan, because it comes back.
What this page covers
- Seborrheic dermatitis of the face: nasolabial folds, brows, hairline and beard area
- Seborrheic dermatitis of the scalp, and dandruff
- A medicated shampoo regimen with contact time explained, built around hair texture, hair-covering habits and realistic washing frequency
- Antifungal and anti-inflammatory topicals for inflamed or itchy areas, for limited periods
- A maintenance plan for the recurrences, including seasonal and stress-related flares
- Safe limits on topical corticosteroid use on the face and scalp, and the perioral dermatitis it causes when used open-endedly
- The hypopigmented presentation in Fitzpatrick IV–VI, and how it is separated from vitiligo and tinea versicolor
- Separating seborrheic dermatitis from rosacea, scalp psoriasis and perioral dermatitis
- Assessment for an underlying internal or immune cause when the disease is sudden, severe or resistant
Who it suits
- Someone with greasy flaking and itch that keeps coming back to the same few places — the scalp, the creases beside the nose, the brows, behind the ears, the beard area — who has bought a different shampoo every few months and never been given a plan
- Someone whose scalp has been treated as ordinary dandruff for years with no real change, or the reverse: treated as psoriasis when it never was. These two are confused in both directions, and it is the examination that separates them, not the shampoo aisle
- Someone left with pale rings or patches where the flaking used to be, frightened that it is vitiligo. On deeper skin this is more often what brings a patient in than the scale itself
- A parent who has come about a baby's scalp — the thick, greasy, yellow crust of the early months — wanting to know what is safe to do to it and what to leave alone
- Not you if you are looking for a course that ends. This is controlled and kept quiet rather than finished, and a good plan aims at long calm stretches and at knowing what to do when it returns. And if it arrived suddenly, spread much further than usual, or has not responded to treatment that should have worked, the honest answer is that the skin is only part of the question — we stop and look further rather than prescribe again, and this page says plainly what we look for
When we advise delaying or not treating
- Topical cortisone on the face or scalp used open-endedly. We give it for a stated period, at a potency chosen for the site, and hand the maintenance to something else. Kept going on the face it thins the skin, brings out fine vessels, and sets off perioral dermatitis — a ring of small bumps and scaling around the mouth and nose that is caused by the cream and is read by the patient as the disease getting worse. Stopping it then brings a rebound of redness and burning, which is what pushes people back onto it
- An unlabeled mixed cream brought from home, a relative or a shop. We stop it rather than treat on top of it: it usually contains a steroid of unknown type and strength, and skin thinned underneath one reacts unpredictably to everything applied afterwards. Bring the container with you
- A scalp cleansing-and-infusion session — a "hydra scalp" — asked for as the treatment for this. We decline. It is an adjunct and it is cosmetic; an inflamed, scratched or infected scalp is treated medically first, and selling the session instead would be selling you the wrong thing
- Elective laser, a peel or needling over skin that is actively inflamed and scaling — beside the nose, across the brows, in the beard. It waits until the skin is quiet. Treating over live inflammation on deeper skin adds a pigment mark on top of the complaint you came with, and that mark outlasts the flare
- An adult medicated or antifungal shampoo, or an adult steroid cream, used on a baby on a relative's advice or a pharmacy suggestion. A baby's skin absorbs more for its size, the eyes are inches away, and infantile scalp crusting is not always what it looks like. The scalp is looked at before anything goes on it
- Pregnancy and breastfeeding are not a reason to leave this untreated — but they change what is chosen, so say so before anything is prescribed, and before you buy anything for it yourself
- A request to keep climbing the ladder on skin that is not behaving like seborrheic dermatitis. Where it came on suddenly, spread well beyond the usual sites, or resists correct treatment, we stop and reassess, and that can include a blood test. Said plainly rather than left to your imagination: seborrheic dermatitis in that pattern is a recognized marker of a weakened immune system from any cause — medicines that suppress immunity among them, and HIV among them — and it is also more common and more stubborn in Parkinson's disease and with some medicines used for neurological conditions. Almost nobody reading this has any of that. Offering the test is not us thinking something about you; it is what that pattern is worth checking for, in anyone it happens to. You may decline it, and nothing about your treatment here changes
Possible effects
Stated in full, because the decision is not sound without them. Most of what follows comes from the treatment rather than from the condition, which is exactly why it belongs before you start rather than after:
- Topical corticosteroids on the face and scalp, used long and unsupervised: thinning skin, fine visible vessels, and perioral dermatitis. The face and the folds show it before anywhere else, which is why potency and duration are limited there and why the maintenance is carried by something that is not a steroid
- Unlabeled mixed creams. Many people arrive having used one for months. What it thinned does not come back quickly, and skin in that state bruises, heals and marks unpredictably
- Medicated shampoos and antifungal topicals sting, dry and irritate. The scalp is sometimes itchier for a while before it settles, and anything that runs down the face stings the eyes. Where irritation is what limits the plan, the plan is changed rather than pushed through
- Tell us if your hair is dyed, bleached, relaxed or chemically straightened. Some medicated shampoos do not sit well with treated hair, and choosing around that at the start is easier than repairing it afterwards
- Contact allergy to a topical treatment is possible, including to products bought over the counter for this exact problem. Skin that becomes more inflamed, itchier or swollen on a treatment is stopped and assessed, not persevered with
- The pale or dark patches left behind. They follow the inflammation and even out once it is controlled — not a scar and not vitiligo — but on deeper skin they are more visible and take months rather than days. The pale rings come from the inflammation itself; the darker marks come from scratching and picking
- Scratching and forceful scale removal break the skin, which invites infection and sheds hair where the scale and the scratching were heaviest. Hair usually returns once the scalp settles, but a scalp that is losing hair is examined properly before anyone reassures you
- In a baby: lifting, combing or scraping the crust off tears the scalp underneath, bleeds, takes hair with it and can become infected. It is softened and washed gently, and never picked
- It recurs. That is its nature, not a failure of the plan, and a flare can follow a change of season, an illness, a stretch of poor sleep or stress, or nothing you can identify at all
A note on darker skin
On Fitzpatrick III-VI this condition often does not look like the picture in the textbook, and that difference is not cosmetic — it is why it gets missed. Instead of redness it commonly shows as pale rings, arcs and patches around the nose, the brows, the hairline and the beard, carrying only a fine greasy scale, and it is the pale patches rather than the flaking that bring most patients in. That appearance is regularly read as vitiligo or as tinea versicolor, at home and sometimes in clinic, and separating the three is an examination rather than a guess. The reassurance is worth giving at the first visit: those patches follow the inflammation, they are not a scar and they are not vitiligo, and they even out once the inflammation is controlled — but on deeper skin they are more visible and take months rather than weeks, and what evens them out is treating the inflammation, not putting anything lightening or bleaching on them. The caution runs in two directions. First, pale patches like these must not be handed to a light or laser treatment as though they were vitiligo: that treats the wrong diagnosis and leaves the inflammation running underneath it. Second, elective laser, peeling or needling over skin that is still inflamed and scaling adds a pigment mark to the complaint you arrived with, and on deeper skin that mark outlasts the flare that caused it, so it waits for quiet skin. On the scalp the honesty is practical rather than clinical: in tightly curled, locked, braided or chemically treated hair, a regimen that assumes frequent medicated washing will not be followed, and a plan nobody follows is not a plan. Heavy oils and long hours under a covering do keep the condition going — that is worked around with you rather than lectured about, and it is a conversation at the visit, not a rule handed down.
Afterwards
- Use what you were given for the period you were given, on the sites you were shown. If a steroid was part of it, it is time-limited and you are shown what carries the maintenance afterwards — do not keep it running on your own, and do not stop a wide-area one all at once
- Keep the maintenance going while the skin is quiet. This is where the long calm stretches are won, and stopping everything the day it looks clear is the commonest reason it is back within weeks
- Leave a medicated shampoo on for the contact time you were given before rinsing. A medicated shampoo washed straight out has not treated anything, and this single point is why more regimens fail than any product choice
- Build the washing around the week you actually have, and say so if the plan does not fit it — the hair you have, how it is styled or covered, and what you can sustain. A plan you cannot keep gets changed, not repeated at you
- Report: skin that suddenly spread, or stopped responding to something that was working; weeping, yellow crusting or fever; a new illness or any new regular medicine; and any cortisone cream anyone hands you for your face, from any source
- Photograph a flare at its worst. The appointment often lands on a good day, and the photograph is the evidence
- For a baby: soften and wash the crust gently as you were shown, and let it lift on its own. Report crusting that spreads off the scalp and face onto the body, skin that becomes raw or weeping, or a baby who is feeding poorly or not gaining weight
Honestly
This is a condition that is controlled and maintained, not a course that ends, and any regimen that ignores hair texture and how often the hair can realistically be washed will simply not be followed. The pale patches it leaves in deeper skin follow the inflammation and even out after it settles, which is worth saying early because they frighten people more than the scaling does.
Common questions
Is this just dandruff? And can anyone catch it from me?
Dandruff is the mild end of the same condition, so yes and no — the flaking on your shoulders and the redness beside your nose are usually one thing, which is why they are treated as one thing. And nobody catches it from you. It is not a hygiene problem and it is not an infection you picked up: the yeast involved lives on everyone's skin, all the time, and what differs is how a particular person's skin reacts to it. There is nothing to disinfect, and no reason to keep your comb, your towel or your prayer mat away from anyone.
The doctor suggested a blood test. It is only a skin problem — why?
Because the skin is sometimes where a change in the rest of the body shows up first, and this condition is one of the places it shows. Ordinary seborrheic dermatitis — the kind that comes and goes at the same few spots for years — raises no question at all, and that is very nearly everyone. But when it arrives suddenly, spreads much wider than usual, or does not respond to treatment that should work, that pattern is a recognized marker of a weakened immune system, from any cause: medicines that suppress immunity, some illnesses, and HIV among them. The same pattern is also more common and harder to settle in Parkinson's disease and with some medicines used for neurological conditions. So the offer follows the pattern on your skin and nothing else about you. You are entitled to know why a test is being suggested, which is the only reason this is written here rather than left vague. Say no if you prefer; your treatment here does not change, and you can change your mind at a later visit. What a test can change is this: these are things that are treated and managed, and knowing early makes a real difference — to the skin and to more than the skin. Results are confidential.
My baby's head is covered in thick yellow crust. Can I comb it off, and can I use my anti-dandruff shampoo on it?
Please do not do either. This is usually cradle cap — the infant form of the same condition — and in most babies it settles on its own without leaving anything behind. Combing, scraping or picking it off tears the skin underneath, which bleeds, takes hair with it and can become infected. And an adult medicated or antifungal shampoo is not a smaller version of a baby product: an infant absorbs more of anything applied, for a much smaller body, and the eyes are right there. Do not use an adult steroid cream either. What is reasonable at home is softening the crust and washing gently so it lifts on its own, and anything beyond that is decided after the scalp is looked at. Bring the baby if the crusting is spreading onto the body, the skin is raw or weeping, or the baby is unsettled, feeding poorly or not gaining weight — a rash that starts as cradle cap and then behaves differently is not always cradle cap.
Is this dandruff or scalp psoriasis? I have been treated for both.
It is the commonest confusion in dermatology, in both directions, and the answer is in the feel of it as much as the look. Seborrheic scale is greasy, yellowish and fine, it sits where the skin is oiliest, and it fades into normal skin without an edge you can trace. Psoriasis feels different under the fingers: a plaque that stands up from the skin with a border you can follow, carrying drier, whiter, stuck-down scale, often running past the hairline onto the forehead as a band. Neither is settled by staring at the scalp alone — the elbows, the knees, the skin folds and the nails are looked at, and they usually answer it. And the two can share a scalp, which is its own answer and changes the plan. Years of treatment for the wrong one is a good reason to have the diagnosis settled properly rather than to try a fourth shampoo.
I have white patches on my face where the flaking was. Is that vitiligo?
Almost certainly not, and this is the fear we hear most on this page. What is left behind is pale because the inflammation interfered with the pigment while it was active, not because the pigment cells have gone. It is the footprint of the condition, and it evens out once the condition is quiet — more slowly on deeper skin, over months rather than days. Vitiligo is a different thing with a different appearance, and the two are separated by examination, not by comparing photographs online at two in the morning. The practical point: treating the inflammation is what returns the color. Nothing lightening, nothing bleaching, and no light treatment aimed at the pale patch itself.
I can only wash my hair once a week, and I cover it most of the day. Is there any point?
There is, and honestly this is the part most plans get wrong rather than the part patients get wrong. A regimen written for hair that gets washed daily is not going to survive contact with a real week, and a plan nobody follows treats nobody. So tell us plainly what your week looks like — how often washing is realistic, how the hair is styled or covered, how long it is covered for, what oils are used and by whose advice — and the plan is built around that. It usually comes down to using the time you do have properly: the right product left on for the right contact time on the days you do wash, and something lighter carrying the days in between. It is easier to work with than people expect.