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).