“Dermatologists prescribe coal tar shampoos for scalp psoriasis if needed and it is considered safe for long-term use,” Dr. Kazin says. Note, however, that using the products too often or on a ...

Hair products, like shampoo, are the most common irritant, but dandruff can also be triggered by dryness in the environment, as well as hygiene habits. Psoriasis is an autoimmune condition ...

Medically reviewed by Katlein Franca, MD When psoriasis affects the scalp, it causes thick, silvery-white or gray scales that may be inflamed and itchy. You may also feel burning or other discomfort.