Psoriasis (pronounced /s??ra?.?s?s/; from Greek ???????? meaning itching condition or being itchy from psora itch and -sis action condition; also termed psoriasis vulgaris) is a common chronic relapsing/remitting immune-mediated skin disease characterized by red scaly patches papules and plaques which usually itch. The skin lesions seen in psoriasis may vary in severity from minor localized patches to complete body coverage.
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