After gastroenteroscopy, it is normal to have a bowel movement in 1~3 days, but the exact time varies from person to person. Gastroenteroscopy is a common test to check whether the mucous membrane of the digestive tract is diseased, after doing gastroenteroscopy, usually 1~3 days defecation belongs to the normal. Because of the need to fast before doing gastroenteroscopy, enteroscopy also need to do intestinal cleaning, taking laxatives will be completely cleaned up intestinal contents. You can eat on the day of the colonoscopy, and your bowel movements will gradually be generated and return to the state of bowel movements before the gastroenteroscopy. If the bowel movement is relatively regular and normal in character before the colonoscopy, normal bowel movement can be resumed 1~3 days after resumption of diet after the colonoscopy. The colonoscopy will not affect the bowel habit and the character of the bowel movement. If symptoms such as black stools, blood in the stool, constipation, etc. occur, you should consult a doctor in time and follow the doctor’s instructions for treatment.