Dietary modification and support for patients during oncology treatment is of great importance for early recovery. Loss of appetite, weight loss, dry and brittle mouth, change of taste, regurgitation, vomiting, constipation and diarrhea are the most common problems. How to guide patients to overcome these side effects and provide them with some practical methods is a very urgent problem faced in the process of oncology clinical treatment and care. Loss of appetite The following are some suggestions to help solve the problem of loss of appetite: 1. When you don’t want to eat solid food, try to eat powdered or fluid food. In addition, you can also drink juice, soup and other drinks instead. If you can, choose to drink between meals so that you don’t feel full too soon when you eat your main meal. Try to drink only a small amount of beverage when you eat a meal. If you want to drink more, it is better to drink 30 to 60 minutes before or after the main meal. 3. Instead of having only three meals a day, have smaller and more frequent meals. This will help you eat more, and will not feel full soon. 4.Put snacks on hand to get. Fruit (fresh or dried fruit), unsalted nuts, seeds and crisps are all good choices. 5, eat some soft foods, cool foods or frozen foods, such as yogurt cheese or popsicles. 6, many people may feel hungry several times during the day, can take advantage of these opportunities to eat a little more. Regular relaxing activities or exercises can also help to improve appetite. Weight loss Many oncology patients will experience weight loss during treatment. If you find yourself losing weight, consult a dietitian and refer to tips: 1, nuts, seeds and malt can be sprinkled on your fruit, salad, cereal, sour cheese or toast bread, when crispy toppings mixed with herbs, onions, garlic or ginger, can be used as a pesto or seasoning sauce for pasta, pasta dishes or vegetables, rolled bananas dipped in chopped nuts. 2, dried fruit (raisins, dried plums, dates) add these foods to muffins, cookies, bread, etc. …… mix with nuts or granola as a snack. 3, eggs Chopped poached eggs and add to salads or vegetables; add more eggs to quiche, pancakes or French toast. 4.Avocados Make avocados into sandwich spread; slice avocados and mix with fruit or salad. 5.Mix soy milk and avocado to make avocado soy shake. Three, mouth or throat pain Radiation therapy, chemotherapy or inflammatory infections can often lead to mouth pain, gum pain, and throat or esophageal pain. Proper hygiene and careful food selection are extremely important so that a sensitive mouth is not further irritated. Here are some practical tips: Eat soft foods that are easier to chew and swallow, such as: 1. bananas, apple puree, peaches, watermelon and other soft fruits 2. yogurt and some soft cheeses 3. mashed potatoes, pasta 4. macaroni and cheese 5. cream cakes, puddings, jellies 6. scrambled eggs 7. cereals, porridge 8. vegetable soups or purees such as peas and carrots 9. pureed meat soups, chopped or finely chopped meat Avoid foods or beverages that may irritate a sensitive mouth, such as: 1, oranges, grapefruit, lemons and other citrus fruits or juices 2, tomato sauce or tomato juice 3, spicy or salty foods 4, raw vegetables, rolled oats, bread on toast, crackers, or other rough, dry foods 5, marketed mouthwash containing alcohol