What you can eat after four days of appendicitis surgery is determined by the length of recovery. If bowel function has resumed with gas and bowel movements, you can eat a liquid or semi-liquid diet of thin, soft noodles, pasta, steamed buns, and rolls, with the addition of nutritious soups, including egg and turnip soups, as well as protein-rich fish and meat broths, which will help the appendicitis surgical incision heal. You can also choose fresh fruits, including apples, bananas, oranges, kiwis, etc. Fruits have vitamin C and blood trace elements, which are good for improving the immune system and improving the patient’s resistance to disease after appendicitis surgery. You should eat small and frequent meals, avoid overeating, and do not eat too spicy, stimulating, greasy food, which is very useful for the recovery of appendicitis.