The human vocal apparatus has complex functions, mainly vocalization and speech. Structural changes in the larynx, a good articulator, inevitably lead to various types of articulation and communication disorders. The main manifestation is different degrees of hoarseness. In severe cases, complete loss of voice and even breathing and swallowing difficulties can be combined. The main manifestations of dysphonia are delayed and abnormal pronunciation, the development speed of pronunciation is lower than the corresponding age, and the speech is unclear or mispronounced. Experts pointed out that there are many causes of dysarthria, patients need to clarify the cause before treatment, so as to ensure the effect of treatment. The main causes of dysphonia: congenital dysphonia: it appears after birth and can be accompanied by congenital laryngeal wheezing or breathing difficulties. Pronunciation disorder caused by improper use of voice: It is the most common, often caused by improper method or excessive use of voice when pronouncing or singing. It is mostly seen in benign proliferative lesions such as vocal fold nodules, vocal fold polyps, and Renk edema. The degree of hoarseness is related to the location and size of the lesion.