Seborrheic dermatitis (SD) is a common scaly inflammatory skin condition (vs. dandruff- no inflammation)
It seems to occur more commonly in blacks, men, immunocompromised patients (e.g. HIV), and persons with neurological and psychiatric disease (e.g Parkinsons disease)
It presents with greasy scaly light, dark, and/ or reddish-purple patches and plaques on sebaceous areas of the skin (e.g. scalp, eyebrows, nose, folds around the mouth, ears)
The exact cause of AD is unknown but it has been associated with a genetic predisposition, altered skin microbiome, increase sebum production, skin lipid composition, inflammation, abnormal immunity, and "western diet"
Management includes topical / shampoo / oral anti-yeast agents, topical steroids, keratolytic (e.g. salicylic acid, coal tar-containing, natural (e.g. tea tree oil)
- Tucker D, Masood S. Seborrheic Dermatitis. 2019 Dec 28. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2020 Jan–.
- Adalsteinsson JA, et al., An update on the microbiology, immunology and genetics of seborrheic dermatitis.
Exp Dermatol. 2020 Mar 3. doi: 10.1111/exd.14091