Enema is a kind of treatment method to inject liquid into the colon through the anal canal to achieve the purpose of laxation and exhaustion, which can stimulate intestinal peristalsis, soften and remove feces, also can cool down and reduce the absorption of toxins through enema, generally used for examination and treatment. 1.Examination: Clean enema can be chosen, which is used to make the intestine clean and keep empty by infusing liquid to cause diarrhea and promote the discharge of feces. It is used for abdominal surgery, examination of fiber colonoscopy, preparation before delivery, etc.; 2, treatment: generally choose to retain the enema, can be added to the infusion of therapeutic drugs, so that it stays in the intestinal cavity for a period of time to achieve the role of treatment, such as pelvic inflammatory disease, colitis, etc.. Most patients do not experience significant discomfort during the enema, but some patients may experience a slight bloating sensation, which usually improves on its own after the enema is completed and the stool is expelled. If severe discomfort occurs, stop the enema immediately and notify your doctor.