Nasopharyngeal cancer is a common malignant tumor of the head and neck. Early detection is curable. The effectiveness of treatment is determined by the early or late diagnosis. It is beneficial for the public to have some basic knowledge of tumor to see a doctor as early as possible. Those who have the following conditions should be highly alert to nasopharyngeal cancer and undergo screening 1. blood in the nasal discharge or nasal bleeding (many people mistake this as “sputum” from trachea or bronchus when they inhale nasal discharge); 2. nasal congestion, especially chronic nasal congestion, which gradually worsens; 3. tinnitus and hearing loss; 4. neck mass with pain (a common symptom that can be detected by oneself, and most likely to be misdiagnosed as inflammation or tuberculosis by non-oncologists in general hospitals); 5. unilateral persistent headache (different from the location and duration of chronic migraine); 6. facial numbness; 7. diplopia, droopy eyelids, dysphagia, hoarseness, tongue extension, etc.; 8. decades-long history of chronic rhinitis or sinusitis; 9. family history of nasopharyngeal cancer. . Screening and census for high-risk groups All the above-mentioned groups should visit ENT department or tumor radiotherapy department for indirect nasopharyngoscopy or nasopharyngeal electronic fiberscopy, nasopharyngeal and neck MRI if possible, and pathological biopsy of masses or tissues if necessary, and repeat the examination once every three months to six months if tumor cannot be excluded.