Generally speaking, it is possible to go without eating the night before a colonoscopy. In principle, the colonoscopy should be performed on an empty stomach for at least eight hours, and the diet the day before should be light. If you do not have a clean diet, you will not be able to have a colonoscopy. Enteroscopy is an examination of the intestines through the digestive tract using a scope. The prerequisite for colonoscopy is to clean out the intestines with laxatives, etc., so that the doctor can have a clear view of the intestines. Therefore, if you do not eat the night before the colonoscopy, it will be more conducive to the emptying of the intestines and improve the preparation of the patient before the examination. If the colonoscopy results are abnormal, it is recommended to consult a doctor in time, with the help of the doctor to clarify the cause of the disease, and to carry out targeted treatment or therapy.