Rose rash and pityriasis rosea are inflammatory reactions of the skin and are accompanied by red rash, both of them will differ in causative factors and somatic symptoms, of which rose rash is an acute infectious disease, while pityriasis rosea is not contagious. First, the causative factors rose rash and rose furfur rash causative factors have not been completely clear, but are related to human herpes virus type 6 (HHV-6) and type 7 (HHV-7) infection. 1, rose rash can be transmitted through respiratory secretions or saliva, is an acute infectious disease; 2, rose furfur rash and immune dysfunction, drug factors, bacteria, fungi, parasitic infections and other factors related to. Second, the symptoms 1, rose rash: rose rash is characterized by a sudden high fever of 39-40 ℃, can be accompanied by convulsions, 3-5 days later suddenly fever and in the neck, chest, abdomen appear pressure of fading red rash, gradually spread to the face and limbs. Rash without itching, flaking and other symptoms, and 1-2 days or even hours that fade; 2, pityriasis rosea: before the onset of the rash can have prodromal symptoms, such as low fever, headache, sore throat, runny nose, decreased appetite, lymph node enlargement, etc.. The rash mostly appears in the trunk and the proximal extremities, may also be in the neck, face and other parts, generally asymptomatic or mild or moderate itching. Six to eight weeks after the onset of the disease, the erythema begins to fade, scaling off without scarring, may appear temporary hypopigmentation or hyperpigmentation. Rose rash and pityriasis rosea both occur in spring and autumn, and are self-limiting diseases, generally can be self-healing, the chance of recurrence is small. When symptoms appear, you can go to the hospital to identify the cause and treat the symptoms under the guidance of a professional doctor, and do not use drugs at will. Avoid contact with others until the rash has been identified, as it may be contagious.