You should pay attention to your diet one week before the colonoscopy and try to eat a light and easy-to-digest diet with less crumbs, less fiber, etc. You should also start taking laxatives the night before the colonoscopy to help empty the bowel of fecal matter, etc., and keep an empty stomach until the colonoscopy. The purpose of this is to clean the intestines so that the mucous membrane of the intestines can be easily observed during the colonoscopy, and so that the diagnosis is not missed. If you eat pig’s trotters before the colonoscopy and cannot keep fasting, the food residue will affect the observation of the intestinal mucosa by the colonoscopy, which will easily lead to the leakage of diagnosis of the disease, and you can no longer do the colonoscopy, but can only contact your doctor to postpone the colonoscopy. Before and after the examination is recommended to strictly comply with medical advice.