Daily stomach pain and diarrhea, i.e. abdominal pain with diarrhea, may be induced by chronic colitis, intestinal tumors, liver and gallbladder diseases as well as irritable bowel syndrome. 1. Chronic colitis: it is generally a chronic inflammation of the intestinal tract induced by various reasons, which may manifest as diarrhea, such as increased frequency of stools and changes in the shape of stools, and may even cause watery stools. In addition, patients may also cause abdominal pain symptoms, usually is the pain around the navel, left lower abdominal pain and so on. 2. Intestinal tumors: If middle-aged or old-aged patients suffer from stomach pain and diarrhea every day, accompanied by emaciation, anemia and bloody stools, they need to be alert to intestinal tumors. 3. Hepatobiliary diseases: for example, cholecystitis or chronic pancreatitis will cause clinical symptoms such as persistent pain in the upper abdomen, accompanied by diarrhea, steatorrhea and dyspepsia and other symptoms. 4. Irritable Bowel Syndrome (IBS): If after a comprehensive examination, no organic disease is found, it is necessary to consider that it may be caused by IBS, which can also be manifested as abdominal pain and diarrhea. It is recommended that patients go to regular hospitals to receive examination and treatment according to the relevant test results.