A bacterial infection of the throat can easily lead to the disease laryngitis. The causes of laryngitis are complex, but they are generally the following broad categories: diseases of surrounding tissues, unhealthy living habits, irregular eating habits, environmental pollution and improper pronunciation. 1. Diseases of the surrounding tissues. For example, when the nose is blocked, some people will choose the mouth to breathe, long-term this will make the nasal cavity on the air to play a filtering and humidification role gradually lost, but also let the throat dry pain, and finally formed laryngitis. The actual fact is that you will find a lot of people who have been in the business for a long time, and you will not be able to see a doctor in time, so bacteria can easily grow and produce laryngitis. 2, life, eating habits irregular. Some people do not pay attention to oral hygiene, alcohol and smoking, or binge drinking, overeating, resulting in reflux of stomach acid and stomach contents to the throat, damaging the throat mucosa. Long-term will lead to chronic laryngitis. 3, environmental pollution. Work pressure, work environment and the kind of high temperature and gray place, after the cold, easy to trigger acute laryngitis. 4, bad pronunciation habits. People should keep a cheerful mind, relieve tension, stay away from the polluted environment, usually also pay attention to personal hygiene, long-term persistence, laryngitis will gradually away.