If the pain is vague under the left rib cage, if it is occasional, it may be caused by some spasm of the intestine, which may be transient and does not require treatment and can be relieved by itself. If the pain is frequent and accompanied by some common symptoms of the digestive system, such as nausea, vomiting, abdominal pain, diarrhea, or even sticky and unpleasant stools and blood in the stool, these cases should be ruled out as colitis, or some occupancy of the gastrointestinal tract, or even tumors. In addition, this situation should also exclude trauma. If necessary, we should do a test, such as a local CT.