Most of the pain in the small intestine is caused by diseases in the intestine, mainly due to the following reasons: 1, abdominal cold, abdominal cold will appear abnormal contraction of the smooth muscle of the intestine leading to the occurrence of pain, at this time you can rest, abdominal warmth to relieve symptoms. 2, gastroenteritis, eating unclean food will lead to gastroenteritis, gastroenteritis will cause pain in the small intestine, but also may have nausea, vomiting, diarrhea and other symptoms, diarrhea and other symptoms. The pain in the small intestine will disappear after the gastroenteritis is cured. 3. other organic lesions of the intestinal tract, such as intestinal obstruction, tumors of the intestine, etc. The patient needs to go to the hospital for the corresponding imaging examination to confirm the diagnosis, and the doctor will do the corresponding treatment according to the patient’s condition.