Itchy Head and Scalp: Common Causes

Fine flakes and mild itch can occur with [Dandruff](/conditions/dandruff/) or seborrheic dermatitis, especially around oily areas. Thick scale that reaches the hairline may fit [Scalp Psoriasis](/conditions/scalp-psoriasis/). Small tender or pus-filled bumps can indicate [Folliculitis](/conditions/folliculitis/). Live insects or firmly attached nits raise concern for [Head Lice](/conditions/head-lice/).

A reaction to hair dye, shampoo, fragrance, or styling products may cause burning, redness, or a rash. Dryness can make the scalp tight and flaky. These clues guide assessment but cannot replace an examination, particularly when several causes overlap.

Pause new products, wash gently with lukewarm water, and avoid scratching or scraping scale. Keep nails short and use a cool compress for brief relief. Do not share brushes, hats, or bedding if lice are possible. A suitable [Medicated Shampoo Treatment](/treatments/medical-dermatology/medicated-shampoo-therapy/) may help some conditions, but the active ingredient and schedule should match the cause.

If lice are found, follow [Head Lice Treatment](/treatments/medical-dermatology/head-lice-treatment/) instructions. Record triggers, rash location, flaking, bumps, and how long the symptoms last so a clinician can narrow the possibilities.

Arrange a medical review when itch persists, returns often, affects sleep, or causes sores, bleeding, scale, or hair loss. Seek prompt care for spreading redness, warmth, swelling, pus, fever, marked tenderness, or a rapidly worsening rash. Children with suspected scalp infection or patchy hair loss should be assessed without delay.

Ask which finding identifies the cause, whether you should stop a product, which shampoo or medicine is appropriate, how to treat scratched skin, and what changes should trigger a follow-up.