Tinnitus of nasopharyngeal cancer is mainly caused by the blockage of Eustachian tube by cancerous tissues. If nasopharyngeal cancer is in early stage, tinnitus has hope of treatment, but if it is in advanced stage, the tinnitus is gradually aggravated, accompanied by hearing loss, so one should consult doctor in time. Nasopharyngeal cancer mostly occurs at the opening of Eustachian tube. When cancerous tissue enlarges and presses the Eustachian tube, tinnitus will occur, which can be manifested as cicadas, insects, and in serious cases, it can be manifested as the sound of machine rumbling. With the enlargement and infiltration of cancerous tissues, tinnitus tends to aggravate gradually, and at the same time, it is accompanied by hearing loss, which can lead to deafness. NPC is more sensitive to radiotherapy, and radiotherapy is the only radical treatment for NPC. If nasopharyngeal cancer is in early stage and radiotherapy is active, tinnitus can be recovered at this time. If the nasopharyngeal cancer is in advanced stage, the tinnitus is permanent and gets worse gradually.