EBV positive, there are two cases, one is with nasopharyngeal cancer, the other is just EBV positive, no nasopharyngeal cancer. In the former case, regular nasopharyngoscopy is needed; in the latter case, it only indicates EBV infection, and the need for nasopharyngoscopy needs to be determined in conjunction with the symptoms and so on. EBV virus, a kind of human herpes virus, is often positive in nasopharyngeal cancer patients and is an important cause of nasopharyngeal cancer. Nasopharyngeal cancer patients need to have regular repeat nasopharyngoscopy to observe the nasopharynx. Nasopharyngoscopy is not necessary if the patient is only infected with the EBV virus and does not have symptoms of nasopharyngeal discomfort, such as a foreign body sensation, blood in the retracted snot, or weight loss. The EBV virus is present in many people and nasopharyngoscopy is necessary if there is nasopharyngeal discomfort and EBV positivity. In the presence of EBV positivity, you need to go to the hospital for treatment under the guidance of a medical professional.