The frequency of enemas depends on the condition of the patient and the purpose of the enema, which may be once or once a day, please consult your physician. If the enema is to do pre-surgical bowel preparation, then the general situation can be once, its purpose is to empty the intestine, so as to facilitate the surgical operation. Similarly, if the enema is for the treatment of constipation, one enema is usually sufficient as long as the dry, hard feces are passed, which is usually once. If the enema is for the treatment of inflammatory bowel disease such as Crohn’s disease, ulcerative colitis, or radiation enteritis, an enema may be administered once daily for therapeutic purposes. In addition, the duration of the enema is also related to the medication used. Some medications can be used for a long-lasting enema, while some should not be used for a long time. It should be noted that when enemas are needed, they should be administered under the guidance of a doctor, and the time of the enema should be chosen accordingly, depending on the purpose of the enema.