Final answer:
Psoriasis is a chronic autoimmune condition that causes red, itchy patches with silvery scales on the skin. It can involve skin folds and is treated with topical creams, oral medications, and light therapy.
Step-by-step explanation:
The description provided indicates a case of psoriasis. Psoriasis is a chronic autoimmune condition that affects the skin, resulting in red, itchy patches with silvery scales. It commonly affects areas such as the elbows, knees, scalp, and back. Psoriasis is characterized by sharply defined red plaques and can involve skin folds. Treatment options for psoriasis include topical creams, oral medications, and light therapy.