Bowel obstruction is known to cause patients to lose weight. Intestinal obstruction is a common gastroenterology disease in clinic. On the one hand, during the period of illness, the condition of some patients is more serious, temporarily unable to eat, only able to intravenous input of nutrient solution, not able to obtain sufficient energy, may cause wasting. On the other hand, patients with intestinal obstruction have abnormal digestive function, which means that they are not able to absorb nutrients adequately, and this may also lead to wasting. Intestinal obstruction is a common gastrointestinal surgical disease, which refers to the obstruction of the passage of intestinal contents due to various reasons, which leads to the physiological dysfunction of digestion and absorption, and the symptoms of abdominal pain, constipation, vomiting, and the absence of defecation and gas can appear. It is recommended to go to the gastrointestinal surgery department of the hospital as soon as possible, and cooperate with the doctor to receive gastrointestinal decompression, adhesion release surgery, intestinal resection and intestinal anastomosis and other treatments according to one’s own condition. The prognosis of intestinal obstruction is relatively good, most of the patients receive timely treatment, basically can recover.