Nasopharyngeal cancer is a very common malignant tumor in daily life, which develops in the epithelial tissue of nasopharynx. So, what are the causes of nasopharyngeal cancer? Hereditary factors: It is found that nasopharyngeal cancer has certain family aggregation phenomenon, and the incidence rate of nasopharyngeal cancer in the south is much higher than that in the north, so it is presumed that nasopharyngeal cancer has a certain connection with heredity. EB virus infection: antibodies against EB virus are found in the examination of nasopharyngeal cancer patients, and with the aggravation of the disease, the antibodies in the body are also increasing, so more attention should be paid to the usual diet to avoid being hurt as much as possible. 3.Environment：Environmental factors occupy a certain position in the pathogenesis of nasopharyngeal cancer. It is found that in the high incidence area of nasopharyngeal cancer, the content of nickel element in diet and water source is higher than that in other areas, so as to determine the relationship between environment and nasopharyngeal cancer. 4, Diet: In daily life, salted fish, pickled, barbecue and other foods rich in a large number of carcinogenic substances should be eaten less, long time consumption will lead to low immunity, the increase of carcinogenic substances in the body, which will increase the chances of cancer, and it has a certain role in the occurrence of nasopharyngeal cancer.