Seborrheic dermatitis, also known as seborrheic eczema, is a chronic papular and scaly superficial inflammatory skin disease that occurs in areas of sebaceous secretion. It may be accompanied by varying degrees of itching. It commonly affects areas rich in sebaceous glands such as the head, face, chest, and back. Initially, the skin lesions are follicular papules, which gradually merge into dark red or yellow-red plaques. These are covered with greasy scales or crusts, and might exhibit exudation, crusting, and erosion, showing eczematous changes. In severe cases, the lesions may become widespread throughout the body, with the skin appearing diffusely flushed and significantly flaky. This condition is then referred to as seborrheic erythroderma. The disease is chronic and recurrent.