When should you worry about itchy scalp if you have dandruff?

Dandruff can cause visible flakes and an itchy, irritated scalp. Flakes may be dry and white or greasy and yellowish. Scratching can make irritation worse and may break the skin. A markedly red or swollen scalp, thick plaques, sores, or changes outside the scalp can point to another condition such as seborrhoeic dermatitis, psoriasis, eczema, fungal infection, or contact irritation.

Wash the scalp regularly with a gentle cleanser and use an anti-dandruff shampoo according to its label. Allow the lather to remain on the scalp for the directed contact time, then rinse thoroughly. Avoid picking flakes, very hot water, and newly introduced fragranced products if they worsen irritation. Keep a note of which products help and whether symptoms return when use is reduced.

Book an assessment if dandruff care has not helped, the itch disrupts sleep, or the scalp repeatedly flares. Prompt review is needed for tenderness, pus, thick crusts, bleeding, swollen glands, or patches of hair loss. A sudden reaction after a hair dye or product, especially with facial swelling or breathing difficulty, needs urgent medical help. Do not assume every flaky scalp is dandruff.

Ask whether the pattern fits dandruff or another scalp condition, which active shampoo ingredient is appropriate, how often to use it, how to manage flares, and whether hair loss or sores need a separate examination.