What should you know about persistent itchy scalp?

The associated findings help narrow the cause. Loose flakes can accompany [Dandruff](/conditions/dandruff/) or seborrheic dermatitis. Thick, defined plaques may fit [Scalp Psoriasis](/conditions/scalp-psoriasis/). Tender bumps or pustules can occur with [Folliculitis](/conditions/folliculitis/), while intense itch with visible nits or affected household contacts raises concern for [Head Lice](/conditions/head-lice/).

Itch can also follow a new dye, shampoo, oil, or styling product. The symptom by itself does not identify one diagnosis, so a clinician may inspect the scalp, hair shafts, skin behind the ears, and nearby areas.

Pause newly introduced fragranced or colouring products and wash the scalp gently with lukewarm water. Avoid scratching, which can break the skin and encourage infection. If flakes or greasy scale accompany the itch, a clinician or pharmacist may guide use of [Medicated Shampoo Treatment](/treatments/medical-dermatology/medicated-shampoo-therapy/).

If lice are found, household members may need checking and the recommended [Head Lice Treatment](/treatments/medical-dermatology/head-lice-treatment/) should be used exactly as directed. Do not share combs, brushes, hats, or towels during assessment.

Arrange a review for itch that lasts, disrupts sleep, causes wounds, or comes with scaling, plaques, pustules, or hair loss. Seek prompt care for facial swelling, breathing difficulty after a product, rapidly spreading redness, fever, severe pain, or pus.

Ask what scalp findings point to the cause, whether a product should be stopped, whether lice need to be ruled out, which shampoo or treatment is suitable, and how to protect scratched skin while it heals.