Belly pain is usually caused by diseases of the digestive system, genitourinary system, etc. Diseases of different organs can lead to pain in different locations of the abdomen, such as the middle abdomen, the upper abdomen, the lower abdomen, etc. 1. Upper abdomen: including the upper abdomen, left upper abdomen and right upper abdomen, the pain in the above parts is mostly related to dyspepsia, gallstones, gastric ulcer, pancreatitis, gallstones, cholecystitis, hepatitis and other diseases. It may also be caused by coronary heart disease, myocardial infarction, angina pectoris and other heart diseases. 2. Lower abdomen: including lower abdomen, right lower abdomen and left lower abdomen, the pain in the above parts may be caused by digestive diseases such as appendicitis, inflammatory bowel disease, proctitis, rectal cancer, etc., or it may be caused by genitourinary diseases such as inflammation of urethra or stone, bladder stone or inflammation, pelvic inflammatory disease, ovarian inflammation, ectopic pregnancy, spermatophoresis, endometriosis, etc. 3. Mid-abdomen: including the mid-abdomen, the right side of the abdomen and the left side of the abdomen, mostly considering inflammation of the small intestine, intestinal obstruction, kidney stones, nephritis, ureteral stones and other diseases. If the patient has long-term or recurrent abdominal pain symptoms, it is recommended to consult a doctor in a timely manner, under the guidance of a professional physician to identify the cause of the disease, and to carry out targeted treatment, so as not to delay the condition.