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It's pretty safe to say that scalp problems of any nature, including itchiness and flaking, are extremely annoying to anyone who suffers from them. But scalp psoriasis — a common condition characterized by thick, red, scaly patches of skin that can cover the entire scalp and be chronic — is arguably the most painful and inconvenient. Thankfully, there are quite a few dermatologist-approved over-the-counter scalp psoriasis treatments that come in the form of oils, ointments, shampoos, and more topical treatments to soothe irritable psoriasis symptoms.