How to manage seborrheic dermatitis

What are you treating?

Seborrheic dermatitis is an inflammatory skin condition that mainly affects oily areas: the scalp, eyebrows, creases beside the nose, ears and central chest. Skin can have white flakes or yellowish, greasy scales, with or without redness. On darker skin, affected patches can look lighter or darker than the surrounding skin. Dandruff is the scalp form without underlying inflammation. The cause is not fully understood. Malassezia, a yeast that normally lives on skin, oil gland activity and changes in the skin barrier all play a role. Antifungals reduce yeast, while other treatments tackle inflammation or loosen scale.123

Make sure the diagnosis fits

A flaky face or itchy scalp is not automatically seborrheic dermatitis. Facial redness can also come from rosacea or contact dermatitis, including reactions to soap, fragrance or hair dye. Seborrheic dermatitis can make facial skin look oily, dry or scaly, so appearance alone can be misleading. Treatment usually needs more than removing a suspected irritant. If facial redness lasts more than two weeks, arrange a dermatologist appointment. A clinician can examine the rash and choose treatment for the actual cause rather than treating every red patch as the same problem.4

How to treat the scalp

1. 1Choose a medicated shampoo labelled for dandruff or seborrheic dermatitis. Options include ketoconazole, selenium sulfide and zinc pyrithione. Follow the product directions rather than using every shampoo in the same way.
2. 2Massage the shampoo into the scalp and leave it on for the directed contact time before rinsing. Some treatment plans use five to ten minutes, but the label or your clinician's directions take priority.
3. 3Use the prescribed washing schedule. Straight or wavy hair often needs dandruff shampoo two to three times weekly; curly or tightly coiled hair can need a once weekly schedule.
4. 4After the scalp clears, continue the maintenance schedule. Dandruff shampoo once weekly is commonly used to prevent flares. Tell your dermatologist if a previously useful shampoo stops working; rotating shampoos can help.

Thick scale sometimes needs a separate descaling treatment before other medicines can reach the skin effectively. These preparations can contain salicylic acid or coconut oil and should be used before the other treatment, following the prescribed directions. Descaling preparations can be messy, so the treatment plan occasionally has a laundry department. Scale removal and yeast control do different jobs; one product does not necessarily replace the other.1

How to treat the face and body

Wash affected skin once or twice daily with a gentle soap free cleanser, then use a light moisturizer to support the skin barrier. Ketoconazole or ciclopirox cream is commonly used once daily for two to four weeks, with repeat courses when needed. Follow the directions for the exact medicine and formulation. For an inflamed flare, a clinician can add hydrocortisone for a short course, commonly up to twice daily for one or two weeks. Do not extend steroid treatment on your own: prolonged use can cause skin thinning and visible blood vessels.13

Eyelids and ear canals need their own approach. An eyelid cleanser that does not irritate can help lift flakes between the lashes. Ear canal inflammation can need medicated ear drops; do not clean inside the ears with cotton buds, which cause further irritation. Antifungal shampoo can also be used on affected body skin when included in your treatment plan.1

What if shampoo and antifungal cream are not enough?

Prescription options include stronger shampoos and medicines that reduce inflammation. Pimecrolimus cream and tacrolimus ointment are steroid alternatives; studies found improvement within two weeks. Roflumilast foam is FDA approved for people aged nine and older and is usually applied once daily. In a clinical trial, 68.3% had clear or almost clear skin within eight weeks. These medicines can cause burning or stinging. Widespread or resistant disease sometimes needs an oral antifungal or supervised light therapy rather than more products added at home.35

Make hair care less irritating

Some ordinary shampoos, conditioners and styling products worsen scalp eczema. Look for products without fragrance, including essential oils, and avoid sodium lauryl sulphate if it irritates your scalp. A shampoo without this detergent can still clean hair even when it produces little lather. If most shampoos irritate, an emollient lotion, a moisturizing wash alternative, can be used to wash hair, although it can leave hair greasy.6

Conditioner is designed to stay on the hair after rinsing, which is impressive commitment for something you are trying to wash away. That residue can irritate scalp eczema. Reduce gels, hairsprays and setting lotions, then reintroduce them individually to identify troublesome products. Use a low or warm hairdryer setting; hot air dries the scalp and increases irritation. Hair dye, especially permanent colour containing PPD, can also irritate. Bleach should not be used on a sensitive scalp or a scalp affected by eczema.6

How long does treatment take?

Think in weeks rather than individual washes. Scalp shampoo courses commonly run for at least a month, while antifungal cream courses commonly last two to four weeks. Adult seborrheic dermatitis often needs ongoing maintenance, not a permanent stop once the skin clears. Stress, tiredness and cold, dry weather can trigger flares. Tracking those patterns helps you recognize when control is slipping, but does not replace treatment.13

When should you seek medical help?

Contact a clinician if self care or nonprescription treatment is not helping. Also seek care if patches drain fluid or pus, form crusts, or become very red or painful; secondary infection can complicate seborrheic dermatitis. An itchy scalp with hair loss, pain or a persistent rash needs assessment. Other causes, including contact dermatitis, psoriasis and scalp ringworm, require different treatment. If nonprescription shampoos fail, a dermatologist can consider a stronger shampoo or topical medicine after checking the cause. Avoid experimenting with internet remedies, which can worsen the problem.27

What about cradle cap in babies?

Do not use the adult dandruff routine for cradle cap. Dandruff shampoo is not recommended for children. Baby shampoo and gentle removal of loosened scales are the usual home approach. Cradle cap generally clears by itself within weeks to months.5