Pityriasis rosea and eczema are two different diseases, pityriasis rosea also does not belong to eczema. Pityriasis rosea is a skin disease that is easy to attack in spring and autumn, its cause is not clear, most people think that it is related to viral infection, it occurs between young and middle-aged people, and it is self-limiting, it usually occurs on the trunk and proximal extremities, the lesions will appear rose-colored patches, so it is called pityriasis rosea; while eczema belongs to allergic skin disease, the cause is related to allergy, autoimmune status, the onset is more urgent, often symmetrical distribution, and it appears as erythema, papules, blisters, vesicles, eczema. In the development of the disease, erythema, papule, blister, vesicle, exudation, crust, intense itching and often scratching, so that the disease is aggravated, so that the causes of pityriasis rosea and eczema both clinical manifestations are different, is completely different two kinds of diseases.