Enteroscopy of abdominal allergic purpura most often shows congestion, edema, and ulceration of the intestinal mucosa. Anaphylactic purpura is a primary vasculitis that primarily involves small blood vessels and is often preceded by a preceding upper respiratory tract infection, and is also frequently characterized by low-grade fever and malaise. In addition to skin purpura, about 50% to 75% of the population will have gastrointestinal tract involvement, which mainly manifests as periumbilical or epigastric colic, vomiting and gastrointestinal bleeding, and is more commonly diagnosed by gastroscopy. Gastroscopy reveals varying degrees of congestion and edema of the gastric and duodenal mucosa, bright red or dark red bleeding spots, erosions and shallow ulcers. If the above symptoms occur, it is recommended to go to the hospital in time for early and regular treatment.