Whether or not you can drink milk after having a colonoscopy depends on the specific situation. If you have a normal colonoscopy and no problems are found or no specific diseases are found, you can drink milk normally. If you have a painless colonoscopy, it is recommended to fast for more than 6 hours before eating. Patients who have colonoscopy and find lesions inside the intestines, such as those who are found to have bleeding in the intestines or those who are given colonoscopic procedures because of bleeding in the intestines and other problems, are not allowed to drink milk and need to fast. You need to cooperate with the doctor to use medication to stop bleeding, promote mucosal repair and other treatments. Doing a colonoscopy to find the existence of erosion or swelling and other lesions are given to take a biopsy, you can drink milk, the specific can consult a specialist.