Left-sided intestinal pain is often caused by the following reasons: first, acute enteritis or chronic enteritis, which is often caused by eating large amounts of inappropriate food, such as chili peppers, spicy strips, pickled foods, or after drinking large amounts of alcohol, generally need to actively adjust the dietary structure, and with the oral regulation of intestinal flora drugs, some patients also need to take oral antispasmodic drugs for treatment. Second, it may be caused by the growth of masses in the intestine, such as benign polyps, or even malignant tumors, which need to go to the hospital to further improve the relevant examination, such as blood routine, liver function, tumor markers, hepatitis B five, etc., and also need to check the abdominal CT, some patients need to do colonoscopy to help clarify. Thirdly, it may be caused by intestinal overlap or intestinal torsion, which requires active surgical treatment to prevent life-threatening.