Stools usually return to normal in about 24 hours after a colonoscopy. 1. Patients need to take an oral laxative before the colonoscopy to empty the bowel in order to maximize the accuracy of the test results. After the examination, the patient should eat mainly fluids, and usually have a bowel movement in about 24 hours. However, if the patient eats a small amount of food, it usually takes 3-4 days to resume normal bowel movements. 2. In addition, patients should avoid overeating and drinking after colonoscopy, so as not to irritate the intestinal tract. They should pay attention to light diet, drink more food that is easy to digest and nutritious such as thin porridge or noodle soup in moderation, chew and swallow slowly, which is conducive to the recovery of gastrointestinal function. If the patient has no bowel movement for a long time, or accompanied by other uncomfortable symptoms, it is recommended to go to the regular hospital in time, under the guidance of the doctor to carry out targeted treatment, in order to reduce the adverse effects of the disease.