Closed-collar intestinal obstruction is characterized by severe abdominal pain, vomiting, abdominal distention, local rebound pain, and fever. Closed-collar intestinal obstruction is caused by the inhibition of intestinal peristalsis and the failure of the contents of the intestine to function normally. Since the contents of the intestine cannot be excreted in time, the food in the intestine will reflux into the stomach and cause irritation to the gastric mucosa, and the patient will suffer from nausea and vomiting. Because the contents of the intestine cannot be eliminated, the blood circulation of the intestine is affected, so most patients will have abdominal distension, and when local pressure is applied, there will be rebound pain and pressure pain.