Which disorder describes thick, crusty patches of red irritated scalp?

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Multiple Choice

Which disorder describes thick, crusty patches of red irritated scalp?

Explanation:
Thick, crusty patches of red irritated scalp are most consistent with psoriasis, a chronic inflammatory skin condition that forms red plaques with thick, silvery scales. On the scalp these plaques can become crusted and very itchy as the scales build up. Ringworm can also cause redness and scaling, but it typically presents as circular patches with hair breakage and is fungal in origin. Dandruff mainly causes white or gray flakes without the large, crusted red patches. Lice produce itching and irritation from scratching, but do not create thick crusted patches of red skin.

Thick, crusty patches of red irritated scalp are most consistent with psoriasis, a chronic inflammatory skin condition that forms red plaques with thick, silvery scales. On the scalp these plaques can become crusted and very itchy as the scales build up. Ringworm can also cause redness and scaling, but it typically presents as circular patches with hair breakage and is fungal in origin. Dandruff mainly causes white or gray flakes without the large, crusted red patches. Lice produce itching and irritation from scratching, but do not create thick crusted patches of red skin.

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