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Seborrheic Dermatitis

By

Thomas M. Ruenger

, MD, PhD, Georg-August University of Göttingen, Germany

Last review/revision Jan 2023
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Seborrheic dermatitis is a common inflammatory condition of skin regions with a high density of sebaceous glands (eg, face, scalp, sternum). The cause is unknown, but species of Malassezia, a normal skin yeast, play an important role. This dermatitis occurs with increased frequency in patients with HIV and in those with certain neurologic disorders. Seborrheic dermatitis causes occasional pruritus, dandruff, and yellow, greasy scaling on the scalp, along the hairline, and on the face. Diagnosis is made by examination. Treatment is with antifungals, topical corticosteroids, tar, and keratolytics.

Despite the name, the composition and flow of sebum are usually normal. The pathogenesis of seborrheic dermatitis is unclear, but its activity has been linked to the number of Malassezia yeasts present on the skin and to the inflammatory reaction to them.

Seborrheic dermatitis occurs most often in infants, usually within the first 3 months of life, and in adults aged 30 to 70 years. The incidence and severity of disease seem to be affected by genetic factors, emotional or physical stress, and climate (usually worse in cold weather). Seborrheic dermatitis may precede or be associated with psoriasis Psoriasis Psoriasis is an inflammatory disease that manifests most commonly as well-circumscribed, erythematous papules and plaques covered with silvery scales. Multiple factors contribute, including... read more Psoriasis (called seborrhiasis or sebopsoriasis). Seborrheic dermatitis may be more common and more severe among patients with neurologic disorders (especially Parkinson disease Parkinson Disease Parkinson disease is a slowly progressive, degenerative disorder characterized by resting tremor, stiffness (rigidity), slow and decreased movement (bradykinesia), and eventually gait and/or... read more ), because of, for example, changes in the activity of sebaceous glands, or among those with HIV/AIDS, likely because of an imbalance of T-cell pro- and anti-inflammatory responses. Very rarely, the dermatitis becomes generalized.

Symptoms and Signs of Seborrheic Dermatitis

Symptoms of seborrheic dermatitis develop gradually, and the dermatitis is usually apparent only as dry flakes or greasy diffuse scaling of the scalp (dandruff) with variable pruritus.

In severe disease, yellow-red scaling papules appear along the hairline, behind the ears, on the eyebrows, in the nasolabial folds, and over the sternum. Marginal blepharitis with dry yellow crusts and conjunctival irritation may develop. Seborrheic dermatitis does not cause hair loss.

Newborns may develop seborrheic dermatitis with a thick, yellow, crusted scalp lesion (cradle cap); fissuring and yellow scaling behind the ears; red facial papules; and stubborn diaper rash.

Older children and adults may develop thick, tenacious, scaly plaques on the scalp that may measure 1 to 2 cm in diameter.

Manifestations of Seborrheic Dermatitis

Diagnosis of Seborrheic Dermatitis

  • Clinical evaluation

Diagnosis of seborrheic dermatitis is made by physical examination.

Seborrheic dermatitis of the scalp must be differentiated from other disorders:

Treatment of Seborrheic Dermatitis

  • Topical therapy with antifungals, corticosteroids, tar, keratolytics, and calcineurin inhibitors

Adults and older children

Treatment of seborrheic dermatitis of the scalp should include shampooing at least twice a week, because less frequent shampooing enables proliferation of Malassezia. Antifungal shampoos (eg, ketoconazole 2% or 1%) are highly effective in controlling the dandruff of seborrheic dermatitis. Because seborrheic dermatitis tends to be chronic and often recurs with cessation of treatment, long-term use of antifungal shampoos (eg, once or twice weekly) is often required. Keratolytic shampoos (zinc pyrithione, selenium sulfide, or sulfur and salicylic acid) and tar shampoos (available over the counter in the US) used daily or every other day until dandruff is controlled and twice/week thereafter are also helpful.

If antifungal and keratolytic shampoos fail to sufficiently relieve pruritus, topical corticosteroid solutions (eg, 0.01% fluocinolone acetonide solution) are used. Although the scalp is one of the areas least susceptible to the adverse effects of topical corticosteroids (eg, telangiectasia, atrophy, folliculitis, acne, striae distensae), adverse effects can occur with long-term use, so topical corticosteroids should be used only as needed.

Seborrheic dermatitis in beard and eyebrow areas is treated similarly to seborrheic dermatitis of the scalp. However, beard and eyebrow areas are more prone to the adverse effects of topical corticosteroids. Thus, corticosteroids should be used less frequently, and lower potency corticosteroid solutions (eg, 0.025% triamcinolone) should be used when possible.

For seborrheic dermatitis in nonterminal hair-bearing areas (eg, nasolabial folds, postauricular areas, sternum), treatment is similar. However, creams (which are typically not acceptable in hair-bearing areas) are preferred to solutions. For milder cases, 2% ketoconazole cream or other topical imidazoles applied twice daily are often sufficient. If not, mild topical corticosteroids (1 to 2.5% hydrocortisone cream, 0.2% hydrocortisone valerate cream) are applied twice daily. Higher potency topical corticosteroids are typically not required and should only be used short-term, if at all, because of the susceptibility of facial skin to the adverse effects of corticosteroids (eg, telangiectasia, atrophy, folliculitis/acne, perioral dermatitis). Calcineurin inhibitors (pimecrolimus and tacrolimus) are also effective, particularly when long-term use is necessary and antifungals alone are not sufficiently effective.

Infants and children

In infants, a baby shampoo is used daily, and 1 to 2.5% hydrocortisone cream or fluocinolone 0.01% oil can be used once to twice daily for redness and scaling on the scalp or face. Topical antifungals such as ketoconazole 2% cream or econazole 1% cream can also be helpful in severe cases.

For thick lesions on the scalp of a young child, mineral oil, olive oil, or a corticosteroid gel or oil is applied at bedtime to affected areas, for example, rubbed in with a toothbrush. The scalp is shampooed daily until the thick scale is gone.

Key Points

  • In adults, seborrheic dermatitis causes dandruff and sometimes scaling on the scalp, around the eyebrows, nasolabial folds, nose, external auditory canal, behind the ears, and on the sternum.

  • Seborrheic dermatitis can cause a thick, yellow, crusted scalp lesion in newborns or thick, scaly scalp plaques in older children and adults.

  • Treatments include topical antifungals; antifungal, keratolytic, and tar shampoos; and topical corticosteroids.

Drugs Mentioned In This Article

Drug Name Select Trade
Extina, Ketodan, Kuric, Nizoral, Nizoral A-D, Xolegel
Anti-Dandruff, Dandrex, Exsel , Selenos, SelRx, Selseb, Selsun, Selsun Blue, Tersi Foam
Akurza , Aliclen, Bensal HP, Clear Away, Clear Away Liquid, Clear Away One Step, Clear Away Plantar, Clearasil Rapid Rescue Deep Treatment, Compound W, Corn/Callus Remover, Curad Mediplast, DermacinRx Atrix, Dermarest Psoriasis Moisturizer, Dermarest Psoriasis Overnight Treatment, Dermarest Psoriasis Scalp Treatment, Dermarest Psoriasis Shampoo plus Conditioner, Dermarest Psoriasis Skin Treatment, Dr. Scholl's Callus Removers, Dr. Scholl's Corn Removers, Dr. Scholl's Extra Thick Callus Remover, Dr. Scholl's One Step Callus Remover, Dr. Scholl's One Step Corn Removers, Dr. Scholl's Ultra, Dr.Scholl's Dual Action FREEZE AWAY, Dr.Scholl's Duragel, DuoFilm Wart Remover, Freezone, Gold Bond Psoriasis Relief, Gordofilm , Hydrisalic, Ionil, Ionil Plus, Keralyt, Keralyt 5, Keralyt Scalp Complete, MOSCO Callus & Corn Remover, MOSCO One Step Corn Remover, Neutrogena Acne Wash, Neutrogena T/Sal Scalp, Occlusal-HP, P&S, RE SA , SalAC, Salactic Film , Salacyn, Salex, Salimez, Salimez Forte, Salisol , Salisol Forte , Salitech, Salitech Forte, Salitop , Salkera, Salvax, Scalpicin 2 in 1 Anti-Dandruff, Selsun Blue, Thera-Sal , Trans-Ver-Sal, UltraSal-ER, VIRASAL, Wart-Off, XALIX
Capex, Derma-Smoothe/FS, DermOtic Oil , Flac, Fluonid , FS Shampoo, Iluvien, Retisert, Synalar, YUTIQ
Aristocort, Aristocort A, Aristocort Forte, Aristocort HP, Aristo-Pak, Aristospan, Azmacort, Children's Nasacort Allergy 24HR Nasal Spray, Cinalog, Cinolar, Flutex, Hexatrione, Kenalog, Kenalog in Orabase, Kenalog-10, Kenalog-40, Kenalog-80, Nasacort, Nasacort AQ, Oralone, SP Rx 228 , Tac-3 , Triacet , Triamonide , Trianex , Triderm , Triesence, XIPERE, Zilretta
A-Hydrocort, Ala-Cort, Ala-Scalp, Alkindi, Anucort-HC, Anumed-HC, Anusol HC, Aquaphor Children's Itch Relief, Aquaphor Itch Relief, Balneol for Her, Caldecort , Cetacort, Colocort , Cortaid, Cortaid Advanced, Cortaid Intensive Therapy, Cortaid Sensitive Skin, CortAlo, Cortef, Cortenema, Corticaine, Corticool, Cortifoam, Cortizone, Cortizone-10, Cortizone-10 Cooling Relief, Cortizone-10 Intensive Healing, Cortizone-10 Plus, Cortizone-5 , Dermarest Dricort, Dermarest Eczema, Dermarest Itch Relief, Encort, First - Hydrocortisone, Gly-Cort , GRx HiCort, Hemmorex-HC, Hemorrhoidal-HC, Hemril , Hycort, Hydro Skin, Hydrocortisone in Absorbase, Hydrocortone, Hydroskin , Hytone, Instacort, Lacticare HC, Locoid, Locoid Lipocream, MiCort-HC , Monistat Complete Care Instant Itch Relief Cream, Neosporin Eczema, NuCort , Nutracort, NuZon, Pandel, Penecort, Preparation H Hydrocortisone, Proctocort, Proctocream-HC, Procto-Kit, Procto-Med HC , Procto-Pak, Proctosert HC , Proctosol-HC, Proctozone-HC, Rectacort HC, Rectasol-HC, Rederm, Sarnol-HC, Scalacort, Scalpicin Anti-Itch, Solu-Cortef, Texacort, Tucks HC, Vagisil Anti-Itch, Walgreens Intensive Healing, Westcort
Elidel
ASTAGRAF XL, ENVARSUS, HECORIA, Prograf, Protopic
Ecoza, Spectazole, Zolpak
Fleet, Kondremul, Liqui-Doss, Muri-Lube
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