This condition is cutaneous scratchiness, a specific type of urticaria. Due to external stimulation of the skin, histamines are released from mast cells in the body, resulting in increased capillary permeability and leaving the body in a sensitive state. Take oral antihistamines plus vitamin C and calcium tablets, and rub the affected area with furnace glycolic lotion or urea ointment. Pay attention to the diet, cold drinks, meat, spicy do not eat, the diet is light, easy to digest. According to the weather changes, appropriate increase or decrease the clothing, reduce the hot and cold air on the skin stimulation, bedding, change clothes regularly, so that the body in a clean, dry environment. If the condition occurs after contact with or consumption of certain food or medicine, and disappears after a period of time, it is considered to be caused by allergy. It is recommended to go to the hospital to test the allergen, find the allergen and isolate it completely, which can prevent the recurrence of skin scratches.