For the sudden onset of dysphonia, there may be several reasons: First, if the patient has a history of psychiatric illness, such as a history of schizophrenia, the sudden onset of dysphonia may be a kind of psychotic, or hysterical, or called functional dysphonia. The main thing is to carry out suggestive treatment, or take the method of local vitamin injection, and then tell him to feel the heat in the throat is cured, and then he can pronounce normally. Second, it may be acute laryngitis. Acute laryngitis suddenly causing loss of voice indicates that the severity of this kind of laryngitis is still very serious, and it may lead to respiratory difficulties or even suffocation, especially for children. So for this kind of situation, antibiotics, hormones, local and systemic use can be given, local is nebulized inhalation, systemic is intravenous infusion. Thirdly, it may be caused by trauma, such as the dislocation of joints caused by trauma, and the voice can be restored to normal with immediate repositioning.