Psoriasis is a common chronic inflammatory skin disease most commonly characterized by well-demarcated, erythematous plaques with silver scale. Psoriasis is usually diagnosed clinically, based on typical appearance on typical sites.
Common signs and symptoms include multifocal or generalized areas of skin redness, flaking and itch. Typical sites of psoriasis are the extensor surfaces of the body (knees, elbows). Psoriasis affecting the flexural sites (axillae, elbows, behind the knees, groin folds) is called inverse psoriasis. An uncommon form of psoriasis may also develop pustules. Nail psoriasis often involves thickening, brittleness, staining, pitting and detachment of the nail plates.
See your doctor if: