Anal enema is an operation in which an enema is inserted into the rectum through the anus to inject the enema solution into the rectum, which is categorized into cleansing enema and retention enema according to the purpose of the treatment. Cleansing enema is to remove the intestinal residual feces, generally used for colonoscopy or intestinal obstruction patients, commonly used warm water, saline or soapy water, etc.; retention of the enema in the enema solution added to the drugs used for the treatment and retained for a period of time, so that the drugs are absorbed in the intestinal tract, generally used for proctitis or pelvic inflammatory disease and other diseases. Enema, should be operated gently, observe the patient’s expression and abdominal signs, if the patient appears abdominal pain and other symptoms need to be stopped immediately, if the symptoms do not relieve the need for abdominal imaging, in addition, intestinal perforation, the patient’s mental anomalies, etc. contraindicated in the anal enema. Enema anus, this operation behavior, need to be operated by professional medical personnel, not blindly on their own, to avoid causing anal and rectal injuries and adverse consequences.