Scalp psoriasis can be mild and almost unnoticeable. But it can also be severe, last a long time, and cause thick, crusted sores. Intense itching can affect your sleep and everyday life ...
Scalp eczema, or seborrheic dermatitis ... Eczema is more likely to be very itchy, and psoriasis usually causes thicker, raised rashes with well-defined scales. Also, eczema usually starts ...