Overview
- Tuesday coverage from dermatologists and scalp experts consolidated consensus that seborrheic dermatitis is a chronic, relapsing inflammatory condition that affects the scalp and other oil-rich areas such as eyebrows, the sides of the nose, behind the ears, the beard, and chest.
- Researchers link the disorder to Malassezia yeast interacting with sebum, a weakened skin barrier, and an overactive immune response, which explains why flakes and inflammation can appear even on oily scalps.
- A 2024 meta-analysis cited in the reporting estimated about 5.64% adult prevalence for seborrheic dermatitis while noting dandruff may affect roughly half of people, though that estimate has limitations.
- Frontline management is use of antifungal medicated shampoos containing ketoconazole, selenium sulfide, or zinc pyrithione applied as scalp treatments and left on for several minutes, with salicylic acid to remove scale and prescription antifungals or anti-inflammatories for resistant cases.
- Practical care steps include washing often enough to prevent oil build-up (many people benefit from every one to two days), using lukewarm water, drying the scalp fully, trimming product buildup, addressing stress, sleep, and diet, and seeing a dermatologist if OTC measures fail or symptoms are severe.