Anaphylactic purpura abdominal pain is more severe in most patients. Anaphylactic purpura is also known as allergic vasculitis. Abdominal pain is seen in about 30% or more of patients with anaphylactic purpura and is mainly due to mesenteric vasculitis. Patients may present with paroxysmal periumbilical colic, which may spread to any part of the abdomen, and the pain is similar to that of acute abdomen, and patients may also suffer from vomiting and other symptoms. About 50% of patients have occult blood in the stool, or bloody stools or vomiting of blood. In severe cases, the disease may be life-threatening due to hemorrhage, so the disease should be taken seriously. If the above symptoms occur, it is recommended that the patient go to the hospital without delay and under the guidance of a physician for regular treatment, so as not to miss the best time for treatment.