Types of dandruff in hair: what they can mean

Small, light flakes with a tight or dry-feeling scalp may reflect simple dryness or irritation. Greasy, yellowish scale with redness often fits seborrheic dermatitis, which commonly affects areas with more oil such as the scalp, hairline and eyebrows. Thick scale, marked redness, broken hairs or sharply defined patches can point to another scalp condition rather than ordinary dandruff. Itchy scalp and scalp flaking can occur together, but their appearance and distribution help a clinician decide what is happening.

Wash the scalp regularly with a gentle cleanser and avoid scratching, which can damage the skin. If flakes keep returning, a clinician may suggest a medicated shampoo containing an anti-yeast or scale-lifting ingredient; use it as directed and allow contact time when instructed. A topical antifungal treatment may be considered when inflammation or yeast overgrowth is suspected. Stop a product that causes burning, swelling or a new rash, and take note of triggers such as fragranced hair products.

Arrange a dermatology assessment if flaking persists despite appropriate shampoo use, spreads beyond the scalp, or comes with soreness, oozing, bleeding, hair loss or thick plaques. Prompt care is sensible for rapidly worsening pain, facial swelling, fever or pus. These features can signal infection or a different inflammatory condition and need an examination rather than repeated product changes.

Ask whether the scale looks more like dandruff, seborrheic dermatitis or another scalp disorder; which cleanser or medicated shampoo suits your scalp; how long to try it; and what signs mean you should return sooner.