Different parts of the surgery for the postoperative food ban varies, thyroid cancer after surgery patients had better not to eat iodine-containing foods, such as kelp, nori, seafood, iodized salt, etc., because these foods will cause the thyrotropin level to rise, and have the possibility of triggering the recurrence of thyroid cancer. After orthopedic surgery of the extremities, all foods and drugs containing the effect of activating blood circulation and removing blood stasis are forbidden to be eaten, such as Sichuan dome, Panax ginseng, Angelica sinensis, etc., which may cause bleeding of the surgical incision, or even the formation of a local hematoma, and affect the healing of the incision. Abdominal surgery is forbidden to eat all food before there is no anal exhaustion, and you can drink less warm water; after anal exhaustion, you can eat semi-liquid diet such as thin porridge, rice paste, etc.; after the patient’s intestinal function is fully recovered, you can return to liquid diet, but you can’t eat spicy, stimulating, greasy food, such as beef, mutton, fatty meat, chili, garlic and other foods, which will aggravate the burden on the gastrointestinal function and cause digestive tract dysfunction.