Clinical enema methods are mainly two: one, keserol enema, mainly given 20-40 ml of keserol direct anal injection, is a convenient, fast enema method. Second, saline or warm soapy water enema, clinically patients take the left lateral position, double lower limb flexion, give local stimulation of the anus, so that the patient is in a state of relaxation, and then direct anal injection, the use of anal tube traction inserted into the rectum, and then add a drainage bag or add an empty needle to give the pressure injection. Generally this method can solve the situation of fecal sludge or dry knots in the intestines, improve constipation, or give the rectum, sigmoid colon medication, such as the treatment of ulcerative colitis.