Nasopharyngeal cancer is a highly prevalent tumor in China, and radiation therapy is the main treatment for this disease with a high cure rate. However, radiotherapy also has many side effects. In order to minimize the side effects, we need to pay attention to the following points after radiotherapy: 1. Pay attention to oral hygiene, rinse your mouth after eating, brush your teeth before going to bed at night, and floss to clean the food residues between your teeth so as to keep your teeth as they are. 2, continue to use the nasopharyngeal irrigator to rinse the nasopharynx, using light salt water can be. This will keep the nasopharynx clean and will not form crusts and mucous membrane erosion. 3.Diet is generally not taboo except for stimulating foods, and eat richly. In short, to strengthen nutrition. You can also take oral B vitamins to promote mucosal recovery. 4.There are problems with the teeth within 3 years after radiotherapy, they cannot be extracted and should be treated conservatively.