First, we diagnose intestinal obstruction, on the one hand, based on the patient's typical symptoms, and then combined with corresponding examinations. Typical symptoms include abdominal pain, bloating, vomiting, and cessation of gas and bowel movements, among which cessation of gas and bowel movements is very important. Some have a state of persistent diarrhea, but the corresponding examination suggests intestinal obstruction, which is not the intestinal obstruction we speak of in surgical terms. After typical manifestations appear, corresponding examinations can be conducted. Currently, the fastest examination for diagnosing intestinal obstruction is an abdominal X-ray. The patient takes an X-ray in a standing position, for example, multiple fluid-gas levels appear in the abdominal plain film, in addition to proximal bowel dilatation and distal bowel collapse, or a CT scan reveals tumorous lesions, which are very important for the examination of the cause of the obstruction.