The common causes of long-term hoarseness in children include laryngitis, vocal polyps, laryngeal tumors, physiological causes and so on. General treatment, drug treatment and surgical treatment can be carried out according to the cause of the disease. 1. Laryngitis: early use of glucocorticosteroids (e.g. dexamethasone) to reduce and eliminate swelling of the laryngeal mucosa, and at the same time, use a sufficient amount of antibiotics (e.g. cefixime, etc.) to control the infection. 2. Vocal polyps: mainly surgical resection, etc. 3. Laryngeal tumor: mainly perform surgical radical operation of the tumor and adjuvant treatment such as radiotherapy. 4. Physiological: It should be noted that some children may be in the period of voice change due to hormonal changes in the body, which often does not require special treatment, and regular follow-up can be done. If there is any discomfort, it is recommended to consult a doctor in time for diagnosis and treatment, and the above medicines should be used according to the doctor’s prescription.