What should you know about persistent dandruff?

Dandruff can produce loose white or yellowish flakes, itch, and scalp irritation without causing a thick, sharply outlined rash. A persistent pattern may also be part of seborrheic dermatitis, which can affect oily areas such as the hairline, eyebrows, ears, and sides of the nose.

Scalp flaking can also occur with psoriasis, contact irritation from hair products, or other skin conditions. The amount of visible scale does not identify the cause. Look at [Dandruff](/conditions/dandruff/) and [Seborrheic Dermatitis](/conditions/seborrheic-dermatitis/) for related explanations.

Use a medicated shampoo according to its label or your clinician's instructions, working it into the scalp rather than only the hair. Allow the product the recommended contact time, rinse thoroughly, and avoid scratching. [Medicated Shampoo Treatment](/treatments/medical-dermatology/medicated-shampoo-therapy/) covers this treatment approach.

If flakes are greasy, itchy, extensive, or resistant to shampoo, a clinician may consider an antifungal treatment or another diagnosis. Reduce exposure to newly introduced dyes, sprays, or fragranced products if symptoms began after a change.

Arrange an assessment when flaking persists despite correct shampoo use, or when there is significant [Itchy Scalp](/symptoms/itchy-scalp/), soreness, bleeding, hair loss, thick plaques, or drainage. Seek prompt care for rapidly spreading redness, swelling, fever, or feeling unwell.

Ask whether this is dandruff or seborrheic dermatitis, how long to try a medicated shampoo, whether an antifungal treatment is appropriate, and which hair products should be paused while the scalp settles.