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.
