Rectal medication, also known as rectal drug delivery, is a method of drug delivery in which the drug is sent through the anus into the anal canal and rectum, so that the drug is absorbed directly by the mucosa of the rectum without passing through the esophagus, stomach and the action of digestive enzymes, which is a relatively common means of treatment for diseases. Rectal drug delivery method is especially commonly used in pediatric medication, mainly because of the relative difficulty of oral medication for children, and the fragility of the stomach and intestines, it is easy to be stimulated by other symptoms. Rectal administration is simpler, faster-acting, and does not pass through the digestive enzymes of the stomach, so it does not irritate the delicate intestines of children. In addition, this method of administration can be used in the treatment of anorectal diseases, especially hemorrhoids, and can be applied directly to the affected area. The active ingredients in the drug can be absorbed and utilized more efficiently, and the effect is more direct, which can improve and treat the symptoms more obviously.