Pain around the navel may be caused by non-infectious gastroenteritis, food poisoning, anaphylactic purpura and other diseases. 1. Non-infectious gastroenteritis: the causes of this disease include reflux of digestive juices, intestinal flora imbalance, inflammatory bowel disease, irritating foods, autoimmune enteritis and so on. It can be induced by unclean diet, decreased immunity, malnutrition and other factors, so the patient will have the manifestation of pain around the navel, accompanied by diarrhea, bloating, belching and other symptoms. 2. Food poisoning: mainly because of eating food containing poisonous substances, including Salmonella spp, parahaemolytic orphan bacteria, Escherichia coli, staphylococcus and so on. If it is gastrointestinal food poisoning, the patient will have epigastric and periumbilical pain, mostly manifested as paroxysmal colic. 3. Anaphylactic purpura: The etiology of this disease is not yet clear, studies show that it may be related to pathogenic microbial infections, heredity, and other factors such as pollen, dust, etc., and it may also be caused by antibiotics, antipyretic and analgesic drugs and other drugs. Most patients experience gastrointestinal symptoms such as abdominal pain, nausea, and vomiting, with abdominal pain located around the umbilicus and in the lower abdomen. There are many causes of pain around the navel in patients, and they need to go to the hospital to clarify the specific cause and target treatment.