Nasal cancer is a malignant tumor that occurs in the nasal cavity, and is a more common malignant tumor in the ear, nose and throat. Most nasal cancers are primary cancers, and those metastasized from other parts of the body are rare. Some patients can be caused by chronic inflammation and long-term stimulation of nasal cavity; some patients are exposed to carcinogenic substances for a long time, such as long-term inhalation of nickel, arsenic, chromium and their compounds due to work or environmental factors; workers with long-term exposure to hardwood chips and softwood dust, softwood protective agents such as chlorophenols have increased risk of developing nasal cavity cancer; if patients have benign tumors in the nasal cavity that have not been effectively treated, they may also develop into nasal cavity cancer etc. Patients with early stage nasopharyngeal cancer may experience nasal congestion, nasal bleeding, pain and other symptoms. Nasal congestion mostly occurs on one side and is intermittent and progressive at first, and then may develop into persistent nasal congestion. The severity of nasal congestion is related to the location of the tumor in the nasal cavity, the degree of pushing out of the walls of the nasal cavity and the presence of secondary infection. If adults find that one side of nasal discharge often contains blood or has a small amount of nasal bleeding, especially when it is accompanied by special odor, they need to be alert to nasal cancer. As the disease continues to progress, patients with nasal cancer will have unbearable headache, numbness, lacrimation and diplopia, difficulty in opening mouth and cachexia such as general failure, anemia and weight loss.