How can I stop seborrhoeic dermatitis from coming back?

You clear the flakes, the redness settles and your scalp finally feels comfortable. Then, a few weeks later, it starts again. Perhaps the skin around your nose becomes sore, dry and flaky, your eyebrows begin to flake or dandruff returns despite changing shampoo.

Seborrhoeic dermatitis tends to come and go, so treatment is not always about clearing one flare and forgetting about it. The most effective approach usually has two parts: calming the skin when symptoms are active, then using occasional maintenance treatment to make future flare-ups less frequent.

Why does seborrhoeic dermatitis keep returning?

Seborrhoeic dermatitis is a common inflammatory skin condition that usually affects areas with more oil-producing glands. These include the scalp, eyebrows, sides of the nose, ears, beard area and centre of the chest.

A yeast called Malassezia naturally lives on the skin. People with seborrhoeic dermatitis are more sensitive to this yeast and tend to react to it in a way that causes redness, irritation and flaking. It is not caused by poor hygiene, and you cannot pass it to someone else.

The condition is usually long term. Treatment can control it very well, but it does not permanently remove the tendency to develop further flare ups. That is why symptoms may return once treatment stops.

Is it dandruff, dry skin or something else?

Dandruff is often considered a mild form of seborrhoeic dermatitis affecting the scalp. The flakes may be white or yellowish, and the skin can feel itchy, dry or irritated.

Seborrhoeic dermatitis elsewhere on the face may cause flaky or sore patches:

• Around the eyebrows
• Beside the nose
• In or behind the ears
• Along the hairline
• Around a beard or moustache
• On the eyelids

It can sometimes resemble eczema, psoriasis, contact dermatitis or a fungal infection. If the rash is unusually thick, painful, spreading or not responding to dandruff treatment, it is worth having the diagnosis checked rather than repeatedly trying stronger products.

Which shampoo is most likely to help my scalp?

An antifungal shampoo is often the most useful starting point because it reduces the yeast involved in seborrhoeic dermatitis.

Ketoconazole shampoo is widely used in the UK. It would normally be used daily for one to two weeks, then once every one to two weeks for maintenance to help prevent symptoms returning. Always follow the product instructions or advice from your pharmacist or clinician.

How you use the shampoo matters. Apply it to the scalp rather than only the hair, leave it on for the recommended time (usually 3-5 minutes), then rinse it out thoroughly.  It can be helpful to rinse the product out so the suds drain over your face.  

If one shampoo does not suit your scalp, a pharmacist or clinician may suggest another option. Products may contain ingredients that target yeast, loosen scale or reduce oiliness. Using several strong treatments at once can leave the scalp more irritated, so introduce one change at a time.

When the scalp is very inflamed or itchy, a clinician may recommend a short course of a corticosteroid scalp treatment alongside the antifungal shampoo. This controls inflammation but is not intended for continuous unsupervised use.

What should I use on my face and around my ears?

A gentle, fragrance-free cleanser and a light moisturiser may help reduce irritation. Avoid scrubbing the flakes away, as this can leave the skin more inflamed and make products sting.

Antifungal creams such as ketoconazole may be used on affected facial or body areas. NICE guidance recommends ketoconazole or another suitable antifungal cream for limited periods, depending on the area and severity.

A clinician may also prescribe a mild corticosteroid for a short flare or a non-steroid anti-inflammatory treatment for sensitive areas. Strong steroid creams should not be used repeatedly on the face without medical advice because facial skin is more vulnerable to side effects.

Be careful around the eyelids. If the skin close to the eyes is sore, swollen or persistent, ask a pharmacist, GP, optometrist or dermatologist what is safe to use there.

Am I making it worse with my hair or skincare routine?

Not necessarily. Seborrhoeic dermatitis is not a sign that you are failing to wash properly, and there is no single perfect routine for everyone.

However, the wrong products can add irritation or create build-up. You may find it helpful to:

• Avoid heavily fragranced or alcohol-based products on active patches
• Rinse shampoo and styling products out thoroughly
• Wash often enough to prevent uncomfortable oil or product build-up
• Avoid scratching or picking at scale
• Introduce new products one at a time
• Use lukewarm rather than very hot water
• Choose a simple moisturiser that does not sting

How often you wash your hair depends on your hair texture, scalp and the products you use. Too little washing can allow oil and product to build up, while very frequent washing with harsh shampoo may leave the scalp dry and irritated. 

Do stress, diet or weather really affect flare-ups?

Many people notice that symptoms become worse during stressful periods, when they are tired or in colder weather. These patterns are worth noticing, but stress is not something you must “eliminate” to clear your skin.

There is not strong evidence that a particular diet cures seborrhoeic dermatitis. A balanced diet is sensible for general health, but restrictive diets and supplements should not replace treatment that targets the skin itself.

Sunlight may make symptoms feel better for some people, but deliberate unprotected sun exposure is not a safe treatment. Use suitable sun protection and avoid relying on tanning to control flare-ups.

Note what changed before a flare, but do not assume every meal, product or stressful day caused it. Sometimes seborrhoeic dermatitis returns because it is a relapsing condition, not because you did something wrong.

When should I get help rather than treating it myself?

A pharmacist can often advise on mild dandruff or a first trial of antifungal shampoo. Arrange an appointment with a GP or dermatologist if:

• Treatment has not helped after a few weeks
• The rash is painful, weeping, crusted or looks infected
• Thick scale is causing significant discomfort
• The condition is affecting your sleep or confidence
• The diagnosis is uncertain
• The rash is widespread or becoming much more severe
• You need repeated courses of anti-inflammatory treatment
• Symptoms around the eyes are persistent

Severe, sudden or unusually widespread seborrhoeic dermatitis can occasionally be associated with another health condition. This is not the usual explanation, but it is another reason to seek medical advice when the pattern changes significantly or does not respond as expected.

The aim is control, not a perfect scalp every day

Seborrhoeic dermatitis can be frustrating because it often returns just when you think it has cleared. That does not mean the treatment has failed.

For many people, the best routine is straightforward: use an antifungal treatment regularly during a flare, continue it occasionally once the skin improves and keep the rest of the routine gentle. If the skin remains inflamed, keeps spreading or never responds properly, it is worth checking both the diagnosis and the treatment plan.

The goal is not to chase every flake. It is to reach a point where flare-ups are less frequent, easier to recognise and much simpler to bring back under control.

About the author

Dr Wisam Alwan is a Consultant Dermatologist at St John’s Institute of Dermatology, part of Guy’s and St Thomas’ NHS Foundation Trust, and Clinical Lead for Children’s Dermatology. He treats a wide range of skin conditions in adults and children, including eczema, psoriasis, acne and rosacea, and has a specialist research interest in the skin microbiome and inflammatory skin disease. He has published widely, contributed to clinical trials and received national recognition for his research.