What should you know about huge chunks of dandruff?

Dandruff can produce loose white or yellow flakes with itch, while [Seborrheic Dermatitis](/conditions/seborrheic-dermatitis/) may cause greasy scale and inflamed patches around the scalp, hairline, ears, or eyebrows. Thick pieces can form when scale accumulates between washes or is held together by oil and product residue. Psoriasis, eczema, contact irritation, and some infections may also cause a [Flaky Scalp](/symptoms/scalp-flaking/), so persistent or unusual scale should not be diagnosed from appearance alone.

Soften thick scale with a gentle wash and lukewarm water; do not scrape it off with nails or a comb. Follow label directions for [Medicated Shampoo Treatment](/treatments/medical-dermatology/medicated-shampoo-therapy/) and allow the product to remain on the scalp for the stated contact time. A clinician may consider [Topical Antifungal Treatment](/treatments/medical-dermatology/topical-antifungal-therapy/) when yeast-related inflammation is suspected. Pause new hair products if burning or rash began after using them, and avoid picking until the skin settles.

Seek medical advice if flakes persist despite appropriate cleansing, the scalp is very red or painful, or there are thick plaques, oozing, sores, or hair loss. Prompt review is sensible for [Itchy Scalp](/symptoms/itchy-scalp/) that disrupts sleep or causes bleeding from scratching. Urgent care is needed for facial swelling, breathing difficulty, fever, or rapidly spreading inflammation.

Does the scale fit dandruff, seborrheic dermatitis, psoriasis, eczema, or contact irritation? Which shampoo ingredient and schedule should I use? How should I loosen adherent flakes without injuring the scalp? What should I do if the treatment stings or hair shedding continues?