The cause of urticaria, also known as rubella and rash, is very complex and most patients cannot find the cause, especially in chronic urticaria. It is thought that infection, drugs, mechanical stimulation, heat or cold, sunlight or insect bites may be the triggering factors for urticaria. The basic damage of urticaria is the appearance of wind clusters on the skin, often preceded by itching of the skin, followed by wind clusters, which are bright red or pale white, with edematous erythema in some patients, the size and shape of the clusters vary, the time of attack is uncertain, the clusters gradually spread and can fuse into patches, some patients can be accompanied by nausea, vomiting, headache, dizziness, abdominal pain, diarrhea, and even chest discomfort and other symptoms, which can be The presence of urticaria can be determined by a scratchy skin rash. For urticaria now includes general treatment, which is mainly to get rid of the cause of the disease, find the allergen, detach from the allergen and avoid the triggering factors. Medications include antihistamines, glucocorticoids, and immunosuppressive drugs.