Hoarseness in children is generally caused by acute congestion and edema of the vocal cords, which results in incomplete closure. The cause is usually twofold: First, acute congestion of the vocal cords due to shouting and repeated talking in children, and the patient usually has no systemic symptoms, only simple hoarseness. Second, laryngitis attacks due to acute inflammatory infections, the pathogenic bacteria are mostly Streptococcus haemolyticus, and patients will have high fever, headache, sore throat, hoarseness and other related symptoms. In terms of treatment, first of all, symptomatic anti-inflammatory treatment is needed, oral anti-inflammatory drugs such as amoxicillin and cefixime, as well as nebulization treatment with budesonide nebulization twice a day, which can be cured in about 10 days.