Chronic rash: Some persistent conditions that can give such a rash are psoriasis, eczema, contact dermatitis, scabies, and a medication reaction. Psoriasis usually gives well-defined red, scaly patches, often symmetrical over elbows, knees. Eczema has poorly-defined, red, fissured patches, often about creases of arms, wrists, behind knees. A dermatologist can diagnose the problem, and give appropriate treatment
Answered 3/27/2018
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