1.Treat acute laryngitis in time to prevent it from becoming chronic. 2, to prevent excessive use of voice, for teachers, singers should pay attention to the correct vocal method, especially during the cold. Teachers and actors should not eat too much before teaching or singing, and it is better not to eat an hour before. Zhang Hao, Department of Otolaryngology, Shanghai Ruijin Hospital 3. Strengthen labor protection and proper handling of harmful gases and dust in the production process. 4. Properly abstain from voice and avoid excessive use of voice at the onset. Excessive use of voice refers to the abuse of voice (use of voice) that exceeds one’s ability. Each person’s vocal ability has three aspects: pitch (frequency range of sound), strength (tension of the vocal cords), and time (time to pronounce the voice), beyond which vocal lesions will occur. 5, voice change period, menstruation period, pregnancy period, the vocal folds have physiological changes, the vocal folds tissue is delicate during this period, and it is not easy to recover after the trauma, pay attention to the voice rest during this period. 6, bad habits, such as smoking, alcohol, chili pepper hobbies and cold drinks after singing, is not good for the laryngeal organs. Therefore, we should try to change such habits. 7, to change the habit of clearing the throat. Many people may often use this action to cough up phlegm in the larynx or make their voice clearer, but this action makes the vocal cords instantly and severely stretched, which can easily cause vocal cord damage. 8, vocal cord polyps, vocal cord nodules after surgery is best to abstain from singing for about 1-2 weeks. 9, soprano singing due to the vocal cords off too tight, both sides of the vocal cords rubbing against each other, so the occurrence of singing occupational disease is more. Tip: If you really need to use the voice should be as low as possible, to prevent vocal fold friction. 10, teach children not to shout, especially the active male children, easy to suffer from vocal cord nodules.