Anal fissure usually does not cause abdominal pain. Abdominal pain may be caused by gastroenteritis, ureteral stones and cystitis. 1. Anal fissure: anal fissure is the location of the anus, the formation of the skin fissure, resulting in pain is usually mainly around the anus, usually does not cause abdominal pain. 2. Gastroenteritis: stomach pain may be caused by gastroenteritis, patients who eat unhygienic or cold food, will cause intestinal flora imbalance, resulting in abdominal pain, and in most cases accompanied by diarrhea, nausea and other symptoms. 3. Ureteral stones: Ureteral stones can also cause abdominal pain, because the stones are discharged into the lower part of the ureter will stimulate the abdomen, so that the patient has pain or with frequent urination, urinary urgency, urinary symptoms. 4. cystitis: bladder between the pubic symphysis and umbilicus, located in the lower abdomen, bladder inflammation can also appear abdominal pain, accompanied by frequent urination, urinary urgency and other symptoms. It is recommended that patients with symptoms of abdominal pain should go to the hospital in time to do the relevant examination, to avoid delaying the condition and causing adverse consequences.