After a colonoscopy, it is generally recommended to rest for 2-3 days, with the exact length of time needed to rest being influenced by the type of test, nursing care, and other factors. Abdominal pain is one of the more common adverse symptoms after a colonoscopy. Before the colonoscopy, the patient needs to take an appropriate amount of diarrhea-inducing medication to better cleanse the intestinal contents. This type of drug will produce high osmotic stimulation of the intestinal mucosal tissue and induce its contraction and spasm, resulting in lower abdominal pain after colonoscopy. In addition, during the procedure, a long, flexible, tubular instrument is inserted through the rectum and advanced to the other end of the large intestine for internal tissue observation or biopsy. During this process, the intestinal mucosal tissues are subjected to stimuli such as catheter friction or tissue damage, which can cause pain in the abdominal area. Most of these adverse symptoms are gradually relieved after 1 day and gradually disappear after 2-3 days. After the examination, patients should wait for 1-2 hours before resuming normal eating. And within 3 days, avoid strenuous activities, avoid spicy, cold, greasy and other types of food.