Nasal cavity crusting after radiotherapy for nasopharyngeal cancer can be carried out under doctor’s guidance to rinse nasal cavity secretion cleanly to prevent further crusting. Nostril crusting after radiotherapy for nasopharyngeal cancer is mostly due to radiation irradiation of nasal mucosa during radiotherapy, which results in congestion of the mucosa, increased and thicker secretion, and formation of dry crust. At this time, do not blow your nose excessively, but rinse the nasal cavity under the guidance of doctor to soften the dry crust and rinse it out, which can be done with light saline or lukewarm water. In addition, during radiotherapy for nasopharyngeal cancer, you should have regular diet, try to eat more high protein and low fat food, such as fish, poultry, milk, eggs, etc. You should also ensure the intake of vitamins, such as greens, cauliflower, carrots, apples, pomelo, and other fresh fruits and vegetables, quit smoking and drinking, and develop a regular work and rest routine and avoid overwork.