Eight-month-old baby’s voice is mute, mainly related to excessive crying. This is because excessive crying can easily cause congestion and swelling of the vocal cords, which may cause incomplete closure of the vocal cords leading to hoarseness. In most cases, the voice will gradually recover after resting and avoiding excessive use of the voice. If the hoarseness is more serious and cannot recover on its own, nebulization treatment can be considered. Generally, nebulization is performed twice a day, and the edema of the mucous membrane of the vocal folds can be reduced through nebulization, and most patients can recover gradually. If the continued failure to improve, hoarseness is particularly serious or accompanied by dyspnea and other symptoms, need to consider doing fiberoptic laryngoscopy, through the laryngoscopy can see the specific situation of the pharynx, so as to carry out the follow-up targeted treatment.