Seborrheic Dermatitis Or Scalp Psoriasis

Scalp psoriasis and seborrheic dermatitis of the scalp can be hard to differentiate. Both are common skin disorders that often affect the scalp. They share some similar symptoms — such as itchy, red, scaly skin. Fortunately, they also share some similar treatments, including daily use of an over-the-counter medicated shampoo, containing:
Ketoconazole
Tar
Pyrithione zinc
Selenium sulfide
Salicylic acid
There is no single test to confirm a diagnosis of psoriasis or seborrheic dermatitis. These skin disorders typically are diagnosed with a visual exam of the affected skin. Sometimes, however, a skin biopsy may be used to help differentiate between the two disorders.