The left side of the ribs below the pain, according to the anatomical location, this place is usually the intestinal tract, if accompanied by some common symptoms of the digestive system, such as nausea, vomiting, abdominal pain, diarrhea, or even sticky stools, or blood in the stools, these cases should be ruled out whether it is colitis, or the gastrointestinal tract of the occupation of some, or even tumors. If the pain is in the muscle tissue, or in the ribs, this case should also rule out trauma. If it is trauma, there is often a clear history of trauma.