(1) over the age of 25, more than two weeks unilateral nasal continuous block, T blood, especially with Chen Qi, nasopharyngeal secretions or small blood clots bloodshot, epistaxis, tinnitus, ear plugging, hearing loss;
(2) continuing unilateral recurrent headache;
(3) above or posterior cervical approach Triangle area of cervical lymph node tumor;
(4) conditional region should set up regular anti-cancer clinic or a large-scale survey of nasopharyngeal carcinoma, which is found early asymptomatic an important means of nasopharyngeal carcinoma. NPC to identify the main risk group, focusing on regular observation and inspection.