What should you know about itchy crusty scalp?

Loose white flakes commonly accompany dandruff, while greasy scale and persistent redness can fit seborrheic dermatitis. Thick, well-defined scale may occur with scalp psoriasis. Small tender crusts around hairs can follow folliculitis. Lice cause itching and can be found as moving insects or firmly attached nits near the scalp. Scratching any of these problems can create scabs, so the crust itself does not identify the original cause.

Wash gently and avoid picking, harsh scratching, and very hot water. Do not share combs, brushes, hats, or bedding until lice have been excluded. A clinician or pharmacist can help choose a Medicated Shampoo Treatment; suspected lice may need Head Lice Treatment and household advice. Note whether scale is oily, silvery, or yellow, and whether there are pustules, hair loss, or recent hair-product changes. Follow product directions and stop if marked burning develops.

Seek prompt review for painful swelling, pus, fever, rapidly spreading redness, significant hair loss, or crusts that bleed repeatedly. Arrange a dermatology appointment when symptoms continue despite careful shampoo use, repeatedly return, or interfere with sleep. Related reading includes Dandruff, Folliculitis, Head Lice, Scalp Psoriasis, Seborrheic Dermatitis, Itchy Scalp, Head Lice Treatment, and Medicated Shampoo Treatment.

Is the crust from scale, scratching, infection, or lice? Which shampoo is suitable for my scalp, and how should it be used? Do I need assessment for hair loss or a skin sample?