It is currently believed that the occurrence of nasopharyngeal cancer is usually closely related to EBV, environmental factors, hereditary factors, poor lifestyle and other factors. 1. EBV infection: EBV infects human oral epithelial cells and B-cells and causes nasopharyngeal cancer by replicating and proliferating in the cells. 2. Environmental factors: If the nickel content in food and water is too high, it may affect the normal metabolism of cells and make the cells proliferate abnormally, which may also cause nasopharyngeal cancer. 3. Genetic factors: some nasopharyngeal cancer patients have obvious race and family aggregation. Therefore, the probability of developing nasopharyngeal cancer may increase for people with genetic susceptibility. 4. Bad lifestyle: long-term consumption of salted fish, preserved food and other pickled food, in which nitrite will increase the risk of nasopharyngeal cancer. Once patients find that they have the possibility of nasopharyngeal cancer, they should seek medical treatment as early as possible, improve relevant examinations under the guidance of doctors, and take targeted treatment and therapy.