Why is my scalp so itchy?

Dandruff and seborrhoeic dermatitis can cause flakes with itching, especially on an oily or irritated scalp. Scalp psoriasis may produce thicker, well-defined scale that can extend beyond the hairline. Folliculitis tends to involve irritated or spot-like areas around hair follicles. Head lice can cause intense itching and may leave nits attached close to the hair roots. A new shampoo, dye, styling product, heat exposure, or scratching can also irritate the skin.

The symptom alone does not identify one condition. Note whether there is scale, redness, spots, broken skin, hair loss, or visible insects or nits. Comparing the timing with a new product or contact with someone who has lice can help a clinician narrow the possibilities. More information is available about [Itchy Scalp](/symptoms/itchy-scalp/), [Dandruff](/conditions/dandruff/), and [Seborrhoeic Dermatitis](/conditions/seborrheic-dermatitis/).

Use lukewarm water, avoid vigorous scratching, and pause newly introduced products until the cause is clearer. A pharmacist or clinician may suggest a suitable [Medicated Shampoo Treatment](/treatments/medical-dermatology/medicated-shampoo-therapy/) when flaking is the main feature. If lice are suspected, do not share combs, brushes, hats, or bedding and ask about [Head Lice Treatment](/treatments/medical-dermatology/head-lice-treatment/). Do not pick spots or apply strong steroid, acid, or insecticide products to the scalp without advice.

Arrange medical assessment for painful swelling, pus, spreading redness, fever, bleeding, or sores that do not heal. Seek prompt advice for sudden patches of hair loss, broken hairs, severe tenderness, or a rash after a chemical product. Thick scale, recurring symptoms, or itching that disrupts sleep may need assessment for [Scalp Psoriasis](/conditions/scalp-psoriasis/) or [Folliculitis](/conditions/folliculitis/). Suspected [Head Lice](/conditions/head-lice/) should be checked when live lice are seen or household spread is a concern.

Ask what the scalp pattern suggests, whether you need a medicated shampoo or prescription treatment, and how long to try it. Mention recent dyes, oils, shampoos, medicines, contacts with lice, and any hair loss. Ask whether persistent flaking fits [Seborrhoeic Dermatitis](/conditions/seborrheic-dermatitis/) or another condition and what should trigger a follow-up.