The initial symptoms of the mother spot of pityriasis rosea, often in the waist abdomen or in the proximal end of the extremities appear larger rose-red patches, the boundary is often clearer, in the edge of the erythema there is collar-like along the erythema of the flaking often without conscious symptoms, or in the case of heat there is slight itching discomfort. Generally, after the mother spot appears about 1 week, in the trunk and the proximal extremities will appear one after another multiple and the skin line consistent with the red spots, only the later pityriasis rosea spots tend to be smaller than the mother spot. For pityriasis rosea, must understand the disease process as a whole.