Nasopharyngeal cancer patients may suffer from tinnitus due to the cancer compressing the opening of Eustachian tube and invading the inner ear. 1. Cancer compressing the opening of Eustachian tube: nasopharyngeal cancer patients may have tinnitus and stuffy ears due to the cancer compressing the opening of Eustachian tube, which leads to the pressure inside the middle ear bones not equal to the outside atmospheric pressure, and so on. 2. Invasion of inner ear: nasopharyngeal cancer patients may have tinnitus and other symptoms due to the destruction of sound transmission and sound-sensing structures of inner ear caused by tumor invasion of inner ear, which may be accompanied by bleeding, pain, increased secretion and other symptoms besides tinnitus. There are many other reasons that can cause tinnitus in nasopharyngeal cancer patients, so it is recommended to go to regular hospitals, consult with professional doctors, and cooperate with doctors to complete relevant examinations to clarify the causes and avoid blind treatment.