It is incorrect and without scientific basis to say that increased nutrition for tumor patients will accelerate the growth of tumor cells and even increase the chances of recurrence and metastasis. Nutritional support for tumor patients is necessary for the treatment and rehabilitation of the disease, and is the guarantee for the implementation of various therapeutic measures. Like normal people, tumor patients need to consume a certain amount of nutrients every day, plus the consumption of tumor growth and the large amount of consumption caused by surgery, radiotherapy, chemotherapy and other therapeutic measures, so tumor patients must replenish the nutrition needed by the body, and the nutrition needed is much more than that of normal people. If tumor patients do not pay attention to nutritional support and supplementation, it will inevitably lead to malnutrition, decline in immune function, inability to withstand to surgery or cause increase in postoperative complications, and therefore cannot complete the treatment carried out on the tumor, which will affect the therapeutic effect and make the clinical cure rate decrease and mortality rate increase. On the contrary, if attention is paid to nutritional support and supplementation for tumor patients, it can improve the nutritional status of patients’ organism, which will not only promote the growth of tumor tissues, but also inhibit malignant tumors, enhance the immune function of the organism, and can effectively cooperate with and withstand all kinds of therapeutic measures to ensure the therapeutic effect, improve the quality of life of tumor patients and prolong the period of survival. At present, in the international treatment of malignant tumors, nutritional support has become an important adjuvant treatment for surgery, chemotherapy and radiotherapy, so patients do not have to have too much concern. How to improve the symptoms affecting eating 1. Weight loss Causes: 1) Surgery to remove tumor or adjacent tissues is practiced. (2) Side effects caused by treatment, such as nausea, vomiting, diarrhea, and malabsorption of nutrients. Dietary principles and improvement methods: 1) Use concentrated food (i.e., high-protein, high-calorie diet) in a varied manner with small meals. 2) Follow the doctor’s instructions and take appropriate supplements. 3) Use a variety of diets to improve the quality of food. (2) Follow the doctor’s instructions to supplement appropriate vitamins and minerals. 2.Loss of appetite Causes: 1) Tumor growth. 2) The effect of chemical drugs 3) The role of toxins in the process of tumor destruction. 4) Destruction of taste buds by radiation. 5) Psychological factors. Dietary principles and methods of improvement: 1) Small and frequent meals (provide high-calorie, high-protein snacks or diets). 2) Use a variety of mild seasonings, often change cooking methods and shapes, and pay attention to color, aroma and taste to increase appetite. (3) Maintain a pleasant mood and a relaxing environment during meals. (4) Do moderate exercise before meals, or use a small amount of some appetizing drinks. (5) If you feel fatigue, you should rest for a while and eat after your strength is restored. Try to cook less greasy food by the patients themselves, otherwise it will affect your appetite. 3. Nausea and vomiting Causes: Caused by chemical drugs or radiation therapy. Dietary principles and improvement methods: 1) Drinking light, cold diet, using acidic, salty food can reduce the symptoms. In case of severe vomiting, antiemetics can be prescribed by a physician. 2) Avoid foods that are too sweet or greasy. 3) Eat dry food before and after waking up and before exercise. 4) Avoid eating cold and hot foods at the same time, as this will easily irritate the stomach and intestines. 5) Eat small, frequent meals and avoid fasting. 6) Drinks are best consumed 30-60 minutes before meals and should be sucked through a straw. 7) Eating should be avoided for 2 hours before receiving radiation or chemotherapy to prevent vomiting. 8) Attention should be paid to the balance of water and electrolytes. 4. Altered sense of taste Causes: 1) Caused by chemical drugs or just suspected treatment. 2) Tumor growth. Dietary principles and improvement methods: 1) Tumor usually reduces the sensitivity of taste buds to sweetness and acidity, and increases the sensitivity to bitterness. Sugar or lemon can add sweetness and acidity, which can be used in cooking, and avoid foods with strong bitter taste, such as mustard greens. 2) Choose foods with strong flavors, e.g. mushrooms, onions. 3) To increase the acceptability of meat, use a little wine or juice to soak or mix with other foods before cooking. 4) Change cooking methods frequently, e.g., cold salad, to promote appetite. 5.Dry mouth Reason: 1) When the radiation treatment site is in the mouth, the salivary glands are destroyed. 2) In the late stage of treatment, it causes inflammation of mucous membrane and burning sensation in the throat. Dietary principles and methods of improvement: 1) often gargle but do not use mouthwash, to keep the mouth moist, to prevent oral infection, but also to protect the teeth. 2) Chew gum to stimulate saliva secretion. (3) At least 0 liters of water per day, can be more with high-calorie drinks. 4) Tea and lemon juice can help reduce the feeling of dry mouth. 5) Avoid foods that are too strongly flavored, such as foods that are too sweet, salty or spicy, and avoid alcohol-containing CUP. 6) Indoor humidity should be maintained. 7) Food should be made into a more slippery shape, such as jelly, puree jelly, and can also be eaten with gravy, broth or beverages to help swallowing. 6. Tongue numbness Cause: caused by taking certain drugs. Dietary principles and methods of improvement: chewing carefully when eating. 7, mouth ulcers Causes: 1) chemical drugs. 2) Head and mouth caused by radiation therapy. 3) Viral infection. 4) Caused by tumor. Dietary principles and improvement methods: 1) Avoid acidic or rough and hard foods. 2) Chew and swallow slowly. 3) Supplement vitamin B complex. 4) Suck liquid food by using a straw. 5) Eat food and drinks at room temperature. 8.Difficulty in swallowing Causes: 1) Inflammation of mucous membranes caused by the late stage of treatment, resulting in a burning sensation in the larynx and a narrowing of the esophagus causing difficulty in swallowing. (2) If the head and neck undergo surgical operation, it affects chewing and swallowing in severe cases. Dietary Principles and Improvement Methods: 1) Try to choose soft, finely chopped food for meals or snacks, and cook with thickening, or eat at the same time with gravy, broth, etc. to help swallowing. (2) Use tube-feeding nutrients. 9. Burning sensation in the stomach Causes: caused by chemical drugs, radiation therapy. Dietary principles and improvement methods: 1) Avoid thick seasonings, fried, greasy food. 2) Adopt small and frequent meals. 3) Drink a small amount of milk (about 1 cup). It helps to improve the symptoms. 4) Take liquid antacids as prescribed by your physician. 10.Abdominal pain Abdominal cramps Cause: Radiation therapy site if in the liver, stomach, pancreas, gallbladder, duodenum or lower abdominal pelvic cavity, such as rectum, bladder, uterus, caused by excessive peristalsis of the intestines. Dietary principles and improvement methods: 1) Avoid gas-producing, rough and fibrous foods, such as beans, onions, potatoes, milk, carbonated beverages and so on. 2) Avoid stimulating foods and condiments. (3) Small and frequent meals, food temperature should not be too hot or too cold. 11. Diarrhea Causes: 1) Tumor (e.g., pancreatic tumor). 2) Drugs or radiation therapy injuring the small intestine. 3) Malnutrition. Dietary principles and improvement methods: 1) Use foods with less fiber to reduce the volume of stool. 2) Avoid excessive fat, fried food and too sweet food. If diarrhea is severe, consider using a light diet (e.g., filtered rice broth, clear broth, fruit juices, and tea). 3) Take care of hydration and electrolyte replacement, and choose foods high in potassium, such as vegetable soups, orange juice and tomato juice. Elemental diets can be used when necessary. 4) Try to eliminate psychological factors that may cause diarrhea. 5) Avoid milk and dairy products. 6) Eat small and frequent meals. 12. Bloating Causes: Drugs or chemical treatments that injure the small intestine and cause bloating. Dietary principles and improvement methods: 1) Avoid gas-producing foods, rough and fibrous foods, such as beans, onions, potatoes, milk, carbonated beverages, etc.. (2) Do not drink too much soup and drinks during meals, preferably 30-60 minutes before meals. 3) If you feel uncomfortable, you can take a walk or do some light exercise to reduce the feeling of bloating. 4) Eat less sweets. (5) Do not eat chewing gum and do not talk while eating to avoid inhaling too much air. 13. Constipation Causes: 1) Caused by radiation therapy, chemicals, or pain medications. 2) Emotional stress. 2) Emotional stress. 3) Lack of moderate exercise. (4) Intestinal function has not yet recovered after surgery. Dietary Principles and Improvement Methods: 1) Use more fiber-containing vegetables, fruits, bran, and whole wheat bread. 2) Drink more water or fruit juice. 3) Relax tense and depressed emotions and do moderate exercise. 4) Develop good bowel habits. 14. Anemia and Vitamin Deficiency Causes: 1) Caused by massive bleeding, damage to the hematopoietic function or lack of hematopoietic elements (e.g., iron and protein, etc.). (2) Vomiting and diarrhea caused by the use of anticancer chemical drugs, loss of appetite, and vitamin deficiency caused by absorption. Dietary principles and improvement methods: Treatments and food supplements should be given according to the symptoms and factors.