Colorectal pain is considered to be ulcerative colitis, intestinal spasm, colorectal cancer and other diseases, and the clinical manifestations of different diseases are somewhat different. Ulcerative colitis abdominal pain can be accompanied by diarrhea, intestinal spasm abdominal pain can be paroxysmal, intermittent, colorectal cancer can have abdominal pain, change of stool pattern and so on. 1. Ulcerative colitis: recurrent abdominal pain, diarrhea, mucous blood stools and other symptoms can be accompanied by fever, emaciation, and abdominal pain can be relieved after defecation. 2. Intestinal spasm: it is a kind of paroxysmal abdominal pain caused by strong contraction of intestinal smooth muscle, and the main symptom is abdominal pain, which is paroxysmal and intermittent, and there may not be any symptom during the intermittent period, and it may be accompanied by nausea and vomiting. 3. Colorectal cancer: there may be abdominal pain, when the tumor invades the sacral plexus, there may be persistent pain in lumbosacral area, and there may be symptoms such as emaciation, abdominal mass, change of stools’ character and so on. It is recommended to go to the hospital for consultation when colorectal pain occurs, so as to ask the doctor to make judgment and clarify the cause of the disease.