Nasopharyngeal carcinoma is one of the common malignant tumors, and the main treatment methods for nasopharyngeal carcinoma are surgery, radiotherapy and chemotherapy. However, many patients will receive radiation therapy after surgery in order to avoid secondary recurrence or metastasis, but during radiation therapy, patients with nasopharyngeal cancer will experience dramatic weight loss, which is caused by many reasons. Since the radiation does not disappear from the body immediately after radiation treatment, it will remain in the body for about one month. Therefore, you should still insist on rinsing your mouth during this period. You can prepare your own light salt water for rinsing your mouth 4~5 times a day, or you can ask your doctor to prescribe some mouthwash. As the mucous membrane of nasopharynx is congested and swollen after irradiation, patients often have dry nasal mucosa, nasal congestion, increased nasal secretion, sticky, and serious cases may affect rest and sleep. Clear cod liver oil or compound peppermint oil can be used to protect the nasal mucosa by self-nasal drops 3-4 times a day. It is best to learn to properly master the simple nasopharyngeal flushing North Korea device flushing method and commonly used fluids. Radiation field skin should not be scrubbed with soap, coarse towel hot water. Avoid direct sunlight exposure when going out. If you have peeling skin, do not tear or scratch it with your hands. After radiotherapy, it can cause dysfunction of the head and neck and jaw and temporal joints, sometimes there is difficulty in opening the mouth and limited neck movement. In order to prevent these complications, during radiotherapy, you should do some appropriate exercises, such as deep breathing, outdoor walking, and slow rotational movements of the neck back and forth and left and right, according to your physical condition. After radiotherapy, do mouth opening exercises, such as holding small round plastic bottles or smooth small round logs in the mouth, and massage the jaw-temporal joints. After treatment, you can also go to a park or an open space outside and play tai chi or move your muscles. The doctor will prescribe some necessary tests, such as X-ray, blood sampling, CT, etc. to understand the whole body condition. As for the diet, you should avoid spicy and irritating foods, such as chili peppers and fried foods. During radiotherapy, you can drink more water, such as American ginseng tea, carrot and horseshoe water, etc. American ginseng has the effect of clearing heat and replenishing qi, and can be sliced and brewed, or used as an ingredient in soup. Clinical data show that scientific and symptomatic treatment methods can increase the 3-year survival rate of patients with mid- to late-stage nasopharyngeal cancer from 22% to 76%, and only early detection and early treatment can achieve satisfactory treatment results. In addition, diet and nursing should not be neglected during the treatment of advanced nasopharyngeal carcinoma, and patients should adhere to a good spiritual and psychological state in order to achieve better curative effects.