The causes of chronic abdominal pain are as follows: 1, chronic inflammation of abdominal organs: such as reflux esophagitis, chronic gastritis, chronic cholecystitis or biliary tract infection, chronic pancreatitis, tuberculous peritonitis, ulcerative colitis, etc.; 2, tension changes of cavernous organs: such as gastrointestinal spasm, biliary tract motility disorders; 3, gastroduodenal ulcer; 4, torsion or obstruction of abdominal organs: such as chronic intestinal obstruction, chronic intestinal adhesions; 5, Tension of organ envelope: such as liver stasis, hepatitis, liver abscess, liver cancer, etc.; 6, poisoning and metabolic disorders: such as lead poisoning, uremia, etc.; 7, tumor compression and infiltration; 8, gastrointestinal nerve dysfunction: such as gastrointestinal neurosis.