Painful pressure on the left intestine is often caused by the following reasons: First, enteritis, when patients eat inappropriate food, such as eating too much chili or spicy food, or drinking too much alcohol, it can lead to spasmodic pain in the intestine, which is also obvious when pressure is applied. Patients need to actively adjust their diet, and if necessary, they can take oral antispasmodic drugs to help reduce the pain. Secondly, it may be caused by infection in the intestine, which needs to be clarified by stool routine and blood routine. Thirdly, it may be caused by intestinal masses, such as benign polyps or even malignant tumors, which require abdominal CT and colonoscopy for clarification. Some patients may have other intestinal diseases, such as intestinal torsion and intestinal entrapment. If this is the case, surgery is needed as soon as possible to prevent life-threatening diseases.