Many people have pain in the stomach before a bowel movement that is related to constipation, and this pain is often relieved with the discharge of the bowel movement. If the pain is not relieved after a bowel movement, it is necessary to look for the specific cause in a clinical context and treat it promptly. In addition to constipation, many causes can also lead to pain in the stomach before a bowel movement. For example, the most common is acute gastroenteritis. Patients with acute gastroenteritis are often related to unclean diet, which may be accompanied by abdominal pain, diarrhea and even fever, nausea and vomiting. If the patient has a feeling of urgency during defecation, prolonged abdominal pain, and mucus-like stools, colitis and dysentery should be considered. Women may also have gynecological inflammation, which increases abdominal pressure during defecation and increases irritation leading to abdominal pain during defecation. If a woman has just had an abortion, there is infection or bruising in the abdomen, which compresses the large intestine and nerves, and abdominal pain occurs with a slight change in abdominal pressure during defecation. However, some women may also experience pain in the stomach before defecation during their biological cycle. Therefore, there are many kinds of pre-poo stomach pains, which need to be combined with clinical ultrasound and imaging examinations to find out the cause and then to treat the symptoms. Do not use painkillers blindly when you have stomach pain.