It is mainly caused by intestinal adhesions after abdominal surgery, but can also be caused by intra-abdominal hernia, intestinal inflammation, intestinal torsion, intussusception, and dry stools, etc. Clinical symptoms are intestinal obstruction can cause abdominal pain, vomiting, abdominal distension and anal cessation of defecation and exhaustion. Treatment includes fasting, gastrointestinal decompression, fluid replacement, maintenance of water-electrolyte balance, and symptomatic treatment such as pain relief if necessary. Since the treatment requires fasting and water, gastrointestinal decompression, so try to fast when doing the examination to diagnose intestinal obstruction.