Acute urticaria refers to urticaria with an acute onset. Urticaria, commonly known as rubella, is a limited edematous reaction of the mucous membranes of the skin, and most patients cannot find the exact cause. The common causes include food, drugs, animal and plant factors, physical factors, mental factors, etc. Patients present with sudden and spontaneous itching of the skin, and soon wind masses of various sizes, round, oval or irregular in shape, appear on the itchy area. Within a few hours, the edema is reduced, and the lesions become erythematous and disappear gradually, lasting no more than 24 hours, but new lesions can occur one after another. Severe cases are accompanied by panic, chest tightness, irritability, nausea, vomiting and even lowered blood pressure and anaphylactic shock. Abdominal pain and diarrhea occur when the mucous membrane of the gastrointestinal tract is involved. If the larynx and bronchi are involved, respiratory distress or even asphyxia occurs. If the infection is caused by the appearance of high fever, chills, rapid pulse and other symptoms of systemic toxicity. The specific treatment plan should be combined with the clinical, and the opinion of the doctor in person should prevail. Those with serious condition with shock, laryngeal edema or respiratory distress should be resuscitated immediately.