It is not good for cancer patients to eat pickled and smoked food, high temperature and spicy stimulating food. 1. Pickled and smoked food, this kind of food contains carcinogenic ingredients such as nitrite, and it is relatively not easy to be digested, after cancer patients eat it, it will aggravate their condition and digestive burden. 2. High-temperature food, mainly for gastric cancer, intestinal cancer and other digestive tract tumors, if the temperature of the food is too high, it will cause stimulation and damage to the lesion area and the mucous membrane of the digestive tract, which will lead to ulceration, bleeding, pain and so on. 3. Spicy and stimulating food, cancer patients’ digestive ability will be reduced, and consuming stimulating food at this time will again lead to weakened digestion, inducing indigestion, constipation and other problems.