The following symptoms may occur during the period of voice change: the first one, the voice becomes mute, the voice may become thicker; the second one, the range of speech, becomes narrower than before; the third one, the speech often appears to be weak and tired of speaking; the fourth one, when clinically doing electronic laryngoscopy, the dark red congestion of the pharynx can be seen, the pharyngeal secretions are more, clinically sometimes the vocal cords can be seen to be congested, the vocal cords The clinical manifestation of thickening of the vocal cords. The vocal change period is a necessary process for everyone, and special attention should be paid to protect the voice during the vocal change period. Clinically, it is recommended that patients try not to speak loudly for a long time, avoid singing for a long time, do not eat spicy and stimulating food, try to avoid smoking and drinking, and avoid bad emotions such as fire and staying up late. If you have a cough or other discomfort, you should be treated promptly.