Infectious acute urticaria is an immune disorder caused by infectious agents such as viruses, bacteria or mycoplasma. Infectious urticaria is usually more severe and is mainly accompanied by fever, nausea and abdominal pain. In severe cases, it can recur and even appear to get progressively worse. When treating urticaria, the first thing to do is to find the cause of the disease and then treat the symptoms, if you can not find the cause of the disease, medication can also be very good control of the disease. Urticaria is generally not easy to cure, mostly recurring state, try to avoid contact with triggering factors in daily life. Severe acute attacks should be immediately sought medical treatment, so as not to delay the condition, resulting in adverse effects.