What should you know about people with dandruff?

Dandruff is a common scalp condition with white or yellowish flakes that may fall onto clothing. It can cause itch, tightness, or mild irritation, while some people notice flakes without discomfort. Seborrheic dermatitis presents with more persistent inflammation, greasy scale, redness, or involvement of the eyebrows, ears, beard, or sides of the nose. Dry weather, stress, infrequent washing, irritating products, and an oily scalp can make flaking more noticeable. Dandruff is not an infection that spreads from person to person.

Use a Medicated Shampoo Treatment as directed on its label or by a clinician, allowing the lather to remain on the scalp for the recommended contact time. Rotate or continue an active ingredient only as advised, because overuse can irritate skin. Rinse thoroughly, avoid scratching, and pause products that sting or leave a rash. A clinician may recommend Topical Antifungal Treatment when yeast-related inflammation is prominent. Gentle washing and a regular routine are usually more helpful than vigorous scrubbing. Improvement can take several washes, and maintenance may be needed when flakes return.

See a clinician if flaking persists despite careful use of an appropriate shampoo, spreads beyond the scalp, or comes with thick plaques, hair loss, pus, pain, or marked redness. A sudden rash after a new dye or product may be contact dermatitis and deserves review. Children, people with a weakened immune system, and anyone with sores from scratching may need earlier assessment.

Could this be dandruff, seborrheic dermatitis, psoriasis, or a product reaction? Which active shampoo ingredient fits my scalp? How often should I use it, and what should I do if burning or redness develops?