No need to fast before colorectal cancer No fasting! No fasting! No fasting! It is important to say it three times. There is a relatively strict bowel preparation before colorectal cancer surgery, but fasting is not required. Many patients mistakenly believe that fasting before surgery will help the operation to proceed smoothly because there will be less residue in the intestine. Pre-operative fasting not only does not help the surgery, but also has a great impact on the patient’s nutrition and health condition, which will be detrimental to the surgery. Before colorectal cancer surgery, the most important thing is intestinal preparation. The intestinal preparation starts from controlling diet. For a period of time before surgery, patients should try to eat soft and less crumbly food (do not eat coarse fiber food such as vegetables and leaves); 3 days before surgery, patients should eat semi-liquid food, such as porridge, noodles, etc.; 2 days before surgery, patients need to take laxatives and enteral nutrition solution to prepare for surgery, and still eat semi-liquid food at this time; 1 day before surgery, patients need to eat liquid food ( The day before surgery, the patient will need to eat a liquid diet (nutrient solution, juice, etc.), as well as laxatives, and an enema on this day; an enema will also be required in the early morning hours of the day of surgery. It is important to follow the doctor’s instructions for bowel preparation and not to fast blindly on your own. In addition to bowel preparation, patients and family members should also observe the patient’s stool before surgery to see the number of times and the nature of the stool (color, shape, etc.), and report any problems to the doctor in a timely manner. In addition, for patients with diabetes, they need to control their blood sugar well before surgery; for patients with cardiovascular disease, they need to stabilize their condition and maintain their water and electrolyte balance, so that the doctor can assess that they are ready for surgery.