What should you know about flaky head skin?

Dandruff tends to cause loose flakes without a sharply outlined rash. Seborrheic dermatitis may add itch, redness, or greasy scale around the hairline and ears. Psoriasis often forms thicker, dry plaques with a clear edge. Scalp ringworm can cause scale alongside broken hairs, tender spots, or patchy hair loss. Hair products, sweat, heat, and vigorous scratching can aggravate the scalp regardless of the original trigger. Appearance alone cannot settle the diagnosis.

Wash the scalp regularly with a gentle product, rinse thoroughly, and dry without vigorous rubbing. Avoid picking, tight headwear, harsh brushes, and products that sting. A medicated shampoo can be useful for some causes; follow the directions and stop if it causes significant burning or swelling. Clean combs and avoid sharing personal hair items while infection is being considered. If scale is persistent or thick, professional assessment can prevent repeated trial and error.

Seek prompt assessment for fever, pus, painful swelling, rapidly spreading redness, tender patches, or sudden patchy hair loss. Make a routine appointment when flaking continues, returns frequently, or affects sleep and daily comfort. A clinician may need to inspect the scalp closely to separate inflammation from infection and select the right treatment.

What features point toward dandruff, seborrheic dermatitis, psoriasis, or ringworm? How should I use a medicated shampoo, and what should I do if the scalp becomes sore? Could any of my hair products be contributing?