Colonic perforation will present abdominal pain, abdominal distension, constipation, peritonitis and other symptoms. 1. Abdominal pain: Abdominal pain is the most common symptom of colonic perforation, especially during defecation, the abdominal pain suddenly increases and gradually spreads to the whole abdomen. 2. Abdominal swelling: partial or total swelling of the abdomen, accompanied by nausea, vomiting and other symptoms. 3. Constipation: decreased bowel movement, dry stools, poor bowel movement and incomplete bowel movement. 4. Peritonitis: Peritonitis is formed when the abdominal organs are infected with bacteria that cause ulcers and perforations. If the condition is serious, there will be a drop in blood pressure and toxic reaction, or even toxic shock and death. If there is a perforation of the colon, it is recommended to consult a doctor in time, under the guidance of the doctor and actively treat to avoid aggravation of the condition is difficult to treat.