A barium enema is a test performed mainly for intestinal disorders. Before the examination, the following aspects are needed: 1. Diet. 2 days before the examination, a diet with less residue and less coarse fiber food is required. 2. Intestinal preparation. Before the barium enema examination, the intestine should be cleaned, soap and water enema, and oral laxatives should be taken.3. Contraindications to barium enema examination mainly include severe cardiopulmonary dysfunction, inability to tolerate the examination, acute stage of gastrointestinal bleeding, intestinal obstruction, etc. After the end of barium enema, you can take oral laxative, or re-enema to promote the barium discharge, to avoid the aggravation of the original intestinal disease caused by barium, according to the specific cause of symptomatic support treatment.