Sudden abdominal pain and diarrhea may be related to indigestion, acute enteritis and irritable bowel syndrome. 1. Dyspepsia: patients may be due to overeating or eating cold and spicy food may lead to gastrointestinal dyspepsia, stimulate stomach cramps occurring abdominal pain, stimulation of the gastrointestinal mucosa causing dyspepsia leading to diarrhea symptoms. 2. Acute enteritis: due to various viruses or other factors lead to irritation and inflammation of the intestinal mucosa, sudden abdominal pain, diarrhea symptoms, can also be accompanied by fever, nausea, vomiting, bowel irregularities and other manifestations. 3. Irritable Bowel Syndrome (IBS): This is a functional disorder characterized by abdominal pain and changes in bowel habits, generally without organic lesions. Diarrhea type patients can appear suddenly abdominal pain with diarrhea symptoms, feces more paste or dilute watery and so on. It is recommended that patients with abdominal pain and diarrhea have been persistent and unrelieved, go to the hospital as soon as possible to find the cause of the disease, take symptomatic treatment, do not judge on your own, so as not to cause adverse consequences.