When the contents of the intestines cannot normally pass through the intestinal tract and be expelled from the body, it is called intestinal obstruction. The main clinical manifestations include abdominal pain, abdominal distension, vomiting, and the cessation of bowel movements and gas passage through the anus. Clinically, some cases of partial intestinal obstruction can still pass gas, and some cases of high intestinal obstruction may also allow gas accumulation below the blockage to be expelled through the anus. However, the ability to pass gas does not mean that the patient's condition has improved; continuous treatment and observation are still necessary.