Anal defecation is the process of relaxing the anal sphincter muscle and expelling the gas when the anus is filled with gas. Anal exhaustion can be used as an indicator for clinical observation of certain diseases such as intestinal obstruction, and can also be used after gastrointestinal surgery to observe the recovery of postoperative intestinal function. 1. When the patient is suspected of having intestinal obstruction, often accompanied by anal exhaustion stops, at this time, the patient may be conscious of the onset of the disease or life since the long-term symptoms of anal exhaustion stops, the doctor can be through the statement of the patient’s medical history, physical examination of the abdomen as well as imaging tests to determine whether the patient has a diagnosis of intestinal obstruction. 2. After gastrointestinal surgery, the gastrointestinal function needs a period of time to recover, and there is often a weakening of intestinal peristalsis before that, so the patient can be instructed to do the action of anal excretion to observe the recovery of intestinal function, and if the anal excretion gradually returns to normal, it can be taken as a sign of the recovery of intestinal function. Anal exhaust is also a normal physiological reaction of the human body, in the exclusion of gastrointestinal dyspepsia, it can reflect the normal peristaltic function of the intestinal tract to a certain extent.