Pain on the left side of the abdomen and the urge to have a bowel movement are most commonly associated with irritable bowel syndrome. Patients with irritable bowel syndrome often have abdominal pain, urge to poop, the characteristics of post-stool relief, that is, after the bowel movement of abdominal pain symptoms can be relieved. Such patients must check the colonoscopy, to rule out organic lesions of the intestinal tract, but also to rule out the urinary tract has no stone. Some patients with urinary stones may also irritate the intestines, causing a bowel movement sensation, which can be diagnosed through colonoscopy and ultrasound of the urinary tract. If there is no organic lesion in the intestines after colonoscopy, irritable bowel syndrome can be diagnosed, and at this time it may be necessary to control the symptoms with drugs that regulate the intestinal flora, as well as those that relieve intestinal spasms. If there are organic lesions in the intestine, such as space-occupying lesions, surgery may be needed to solve the problem.