1.Choice of diet After radiotherapy, tumor patients commonly have dry mouth and tongue, red coating and light flaking, thin pulse strings and other symptoms. However, due to the different parts of the tumor treated by radiation therapy, there are differences in dietary choices. (1) After radiotherapy for head and neck tumor, patients should take more products that nourish yin and produce fluid, clear heat and lower fire, such as bitter melon, carrot, tomato, lotus root, jellyfish, cabbage, etc. The main food should be semi-liquid or soft and easily digestible food. (2) After radiotherapy for chest tumor patients, radioactive fibrosis can occur, lung function is weakened, shortness of breath, chest tightness, cough, so you should take more nourishing Yin and moisten the lungs, nourish the Qi and blood.