Enema is a certain amount of solution through the anus, rectum, with an anal tube into the colon to help patients laxative exhaustion, generally used for preoperative intestinal cleanup or disease treatment. It is operated as follows: 1. Configure the appropriate solution according to the purpose of enema, clinically commonly used are soap and water, saline, etc.; 2. Patients take the left side lying position, double knee flexion area to expose the buttocks, put the enema solution on high, expel the excess gas in the anal canal, then lubricate the front end of the anal canal with liquid paraffin; 3. Insert the anal canal into the rectum after good lubrication, pay attention to the gentle action to avoid damaging the mucosa. Then open the enema clamp, so that the liquid slowly flow into the rectum; 4, with the infusion of liquid, most patients will have the emergence of bowel movements, at this time you can do deep breathing, enema solution position properly lowered. If you find that the liquid no longer continues to flow down, you can gently move the anal tube to avoid fecal blockage; 5, after the completion of the liquid infusion, close the enema clamp, wrap the anal tube with paper towels and slowly pull out, wipe the anus clean. Lubricate the anal tube before the enema must be sufficient to avoid damage to the rectal mucosa during insertion; the speed of liquid inflow should not be too fast to avoid causing defecation reflex. During the enema, when the patient has severe abdominal pain, panic and shortness of breath, pale face and other symptoms, the operation should be stopped immediately and the doctor should carry out emergency treatment.