After having a general colonoscopy, you can eat liquid food, such as porridge and egg soup. Ordinary colonoscopy usually can eat after the examination, but pay attention to light, easy to digest food, such as congee, egg soup and so on. As the examination process will cause some stimulation to the intestinal mucosa, it is important to avoid food causing gastrointestinal discomfort at this time. Painless colonoscopy does not take any therapeutic operation, and usually requires 2-3 hours of observation before you can eat light, easily digestible food. Because anesthetics are used in the examination, you need to wait for the anesthetic effect to wear off. When polypectomy is performed during colonoscopy, the duration of water fasting after polypectomy and other treatments needs to be decided according to the size of the wound and the bleeding situation. Note that whether it is a general examination or a treatment operation, if symptoms such as blood in the stool or abdominal pain occur, it is necessary to immediately fast and seek medical attention immediately.