What should you know about crusty dandruff on scalp?

Dandruff produces visible flakes from the scalp. When oil, scale, and hair products collect, the flakes can stick together and form crusts. Itching and redness may occur, especially when the scalp is inflamed. [Seborrheic Dermatitis](/conditions/seborrheic-dermatitis/) can affect the scalp and other oily areas, while [Dandruff](/conditions/dandruff/) is a common explanation for recurring flaking without a thick plaque.

Crusting can also follow scratching, contact irritation, psoriasis, or infection. The distribution, colour, thickness, hair loss, and condition of the skin help a clinician distinguish these possibilities. Read about [Itchy Scalp](/symptoms/itchy-scalp/) or [Flaky Scalp](/symptoms/scalp-flaking/) if those are the main symptoms.

Wash regularly with lukewarm water and massage the scalp gently with fingertips rather than scraping. Follow the label directions for a [Medicated Shampoo Treatment](/treatments/medical-dermatology/medicated-shampoo-therapy/) if a pharmacist or clinician recommends one, allowing it to contact the scalp for the advised time. Avoid sharing combs, picking scale, or layering fragranced products over irritated skin. If symptoms continue despite consistent care, ask about [Topical Antifungal Treatment](/treatments/medical-dermatology/topical-antifungal-therapy/) or another diagnosis.

Arrange medical review for painful crusts, bleeding, pus, foul odour, swollen glands, broken skin, or patchy hair loss. Seek prompt care if redness spreads or you develop fever. A scalp problem that repeatedly returns, affects the ears or face, or prevents sleep may need prescription treatment and a closer examination.

Ask which pattern fits your scalp, how long to try a medicated cleanser, whether you should rotate products, and which ingredients could irritate you. Mention new hair dye, oils, styling products, or medicines that preceded the crusting.