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 Characteristics lesions of Psoriasis  Lesions exhibit the following characteristic as:  • Scaling papules (raised lesions <1 cm in diameter).  • Plaques (raised lesions >1 cm in diameter).  • Well circumscribed, circular, red papules or plaques.  • Grey or silvery-white, dry scaling from plaques.  • The lesions are typically distributed symmetrically on the scalp, elbows, knees, lumbosacral area, and in the body folds.  • Nail involvement may be present, particularly if psoriatic arthritis (PsA) is present.  • Despite the above-mentioned characteristic presentation, the morphology can range from small tear-shaped papules (guttate psoriasis) to pustules (pustular psoriasis) and generalized erythema and scale (erythrodermic psoriasis).