Regarding the issue of avoiding food, it can be understood in this way. In the Jin Kui, it is said that “the taste of food is harmful to the body”, and this “harmful to the body” means that improper diet will be detrimental to the body (including the sick body), and avoiding this detriment means “avoiding the mouth”. The relationship between human diet and medical treatment, in general, seems to have two aspects. On the one hand, it is preventive, that is, the diet is appropriate, you can maintain health DD prolong life, can also prevent disease; on the other hand, it is therapeutic, in the further development of disease or recurrence, and conducive to physical recovery. For cancer patients, the principle of “quot;taboo” is summarized as follows: ① taboo has its theoretical basis and certain principles, and cannot be implemented blindly. ②The taboo is not nonsense, nor can it be extended arbitrarily with superstitious color. ③There is a difference in the treatment of contraindications. ④The taboo is also related to the treatment effect of the disease. Disease treatment effect is better, the taboo issue is often not noticed by doctors and patients, not become a problem in the treatment, but like cancer diseases, treatment effect is poor, the taboo is more attention. Like drugs, food also has four flavors: cold, hot, warm and cool, and five flavors: acid, bitter, sweet, pungent and salty. Clinical experience tells us that skin cancer ulcers are forbidden to eat meat and fishy hair; lung cancer is forbidden to eat spicy food; edema is forbidden to eat salt; jaundice is forbidden to eat fat; warm fever is forbidden to eat spicy and hot food; cold disease is forbidden to eat melons and fruits; patients under radiotherapy and chemotherapy, who feel fever, sore throat and dry stool, can eat more vegetables, melons and fruits and other cold food, but pay attention to not too much, so as not to affect the gastrointestinal function of patients; ginger, pepper, garlic, wine If tumor patients have cold pain in stomach and abdomen, they can eat them, but if they eat more, they will produce phlegm and fire, which will stimulate tumor, so patients with tumor of chest and abdomen and skin tumor should use them with caution. Certain foods should be avoided when taking certain Chinese medicines, such as turtle nail avoiding amaranth, thornbush avoiding fish and crab, asparagus avoiding carp, atractylodes avoiding peach and garlic, honey avoiding green onion, iron filings avoiding tea, ginseng avoiding vegetable tetras, etc.