Laryngeal cancer is a malignant tumor originating from the epithelial tissue of the larynx mucosa and is one of the common malignant tumors of the head and neck. It is mostly seen in middle-aged and elderly men. The incidence of laryngeal cancer accounts for about 1-5% of the whole body tumors, and ranks third after nasopharyngeal cancer, nasal cavity cancer and sinus cancer in the field of otolaryngology. So, what are the causes of laryngeal cancer? The following are the causes of laryngeal cancer 1, excessive alcohol consumption: long-term stimulation of mucous membrane can cause cancer by denaturing it. 2, air pollution: long-term inhalation of harmful gases such as sulfur dioxide and productive industrial dusts such as chromium and arsenic can easily cause laryngeal cancer. 3.Smoking: tobacco burning can produce tobacco tar, of which benzopyrene can be carcinogenic and tobacco smoke can cause cilia movement to stop or retard, and also cause mucosal edema and bleeding, so that epithelial hyperplasia and thickening of squamous chemistry can be the basis of carcinogenesis. 4.Pre-cancerous lesions: laryngeal keratosis and benign laryngeal tumors such as laryngeal papilloma may become cancerous after repeated attacks. 5.Sex hormone: The experiment shows that the percentage of estrogen receptor positive cells in laryngeal cancer patients is significantly higher. 6.Chronic inflammation: stimulation such as chronic laryngitis or inflammation of respiratory tract. 7.Radiation: treatment of neck swelling with radiation can cause cancer. 8.Virus infection: It is closely related to the generation of cancer. It is generally believed that virus can cause cells to change their nature and undergo abnormal division; virus can be attached to the genes and uploaded to the next generation of cells to undergo cancerous transformation.