The causes to be considered for pain 3-5 cm to the left of the navel are gastrointestinal dysfunction, left ureteral calculi, and left-sided colon disease. If the abdomen gets cold, or if the patient eats spicy and stimulating food, and also eats cold food, it may lead to gastrointestinal dysfunction, and pain will occur on the left side of the navel, usually hidden pain, often accompanied by abdominal distension. If a left ureteral stone occurs, the patient will experience abdominal cramps, often accompanied by hematuria, and even soreness and discomfort in the left lumbar region. If diseases occur in the left colon, such as colitis, colon cancer, etc., abdominal pain, often accompanied by diarrhea and blood in the stool, will occur. Patients are advised to go to the hospital in time and need to improve the examination, such as blood routine, urine routine, stool routine, colonoscopy and so on, to be able to make a clear diagnosis, and then the corresponding treatment can be carried out.