Vocal oedema refers to edema, erosion and submucosal hemorrhage of the vocal mucosa. So how can vocal fold edema be prevented? 1.To let the vocal folds rest in time, avoid long time talking and singing, and try not to shout. 2, to actively exercise to maintain a good state, so that the vocal cords are not easy to congestion, edema, not easy to grow polyps or small nodules. 3, maintain good habits, should try to avoid strong tea, spicy food, tobacco and alcohol stimulation, so as to avoid vocal cord congestion, edema. When you have a cold or cough, your vocal cords are already congested and edematous to varying degrees, and excessive vocalization and karaoke will aggravate the congestion and edema, making it easier to grow polyps or nodules. 5, the voice health care during menstruation should also pay attention to the vocal cords during menstruation is mildly congested, swollen, therefore, to avoid abuse of voice during menstruation. 6, pay attention to voice health care during the voice change period. The voice change period is a natural physiological phenomenon in the process of voice development of each person, and generally the voice change period for boys is 10-12 years old and for girls is 12-14 years old. During this period, the pitch of the voice decreases significantly and changes from a child’s voice to an adult’s voice. Special attention should be paid to not shouting, do not sing for a long time, read aloud for a long time, otherwise, it is easy to grow vocal nodules. 7, singing karaoke, according to their own situation, choose the right song, because everyone’s vocal cords are not the same, some people are not suitable for choral soprano, do not sing high-pitched pop songs, because when singing soprano, vocal cord vibration frequency is very fast, vocal cord vibration frequency per second up to more than a thousand times, it is easy to cause vocal cord damage. 8, feel vocal fatigue, to let the vocal cords rest. 9, long loud speech, singing karaoke often feel dry mouth, to drink warm water to moisten the throat, do not drink and cold drinks. 10, maintain a good state of mind, try not to lose temper, quarrel.