If you eat noodles after colonoscopy, it does not matter if they are light and soft; if they are greasy, cold, spicy and stimulating and difficult to digest, they are likely to cause abdominal pain, bloating, nausea and other gastrointestinal symptoms. After the colonoscopy, due to mechanical stimulation of the gastrointestinal mucosa, may cause abdominal discomfort symptoms such as abdominal distension, abdominal pain, nausea. The colon of a normal person is about 1.5 to 2 meters long, but the colonoscope only needs to enter 70 centimeters from the anus to reach the beginning of the colon, so the intestines are not in a fully expanded state in the human body, but are curled up in a certain shape in the abdominal cavity. Therefore, colonoscopy will cause abdominal discomfort, and it is not recommended to eat immediately after the colonoscopy, so as not to aggravate the burden on the stomach and intestines and further stimulate the gastrointestinal mucosa, causing nausea, abdominal pain and other discomforts. If invasive operations such as polypectomy or hemostasis are performed, it is recommended to fast for 12 to 24 hours after colonoscopy. It is not recommended to eat immediately after colonoscopy, and colonoscopy should be completed under the guidance of a doctor.