Nasopharyngeal cancer may be caused by hereditary factors, viral infection, environmental factors and so on. 1. Hereditary factors: when there is nasopharyngeal cancer in the family, there is a great possibility that the offspring will suffer from nasopharyngeal cancer. 2. Viral infection: it is mainly the infection of EB virus, if this virus exists in human body for a long time and is not cleared by immunity, it may induce the mutation of human body’s genes and DNA, and induce nasopharyngeal cancer. 3. Life factors: Nasopharyngeal cancer can be caused when patients consume rice and water with high content of nickel as trace element for a long time, or consume ammonium nitrite compounds for a long time. When patients have nasopharyngeal cancer, they should consult in regular hospitals in time and actively cooperate with doctors for treatment.