The hoarseness of a five-year-old baby’s voice can be seen in acute infectious laryngitis, improper use of the voice, etc., according to the cause of the appropriate treatment, such as improper use of the voice need to pay attention to rest, to avoid using the voice of the incorrect behavior, drink more water and so on. 1. Acute infectious laryngitis: usually refers to diffuse inflammation of the mucous membrane of the larynx, preferably in the lower part of the vocal folds, spring and winter, can be caused by viral or bacterial infections, often manifested as hoarseness, barking cough or fever, etc., and some of the babies may have inspiratory laryngeal stridor with dyspnea. Some babies may have inspiratory laryngeal wheezing with dyspnea. If the disease worsens, dyspnea and asphyxia may occur. It is recommended to consult a doctor in time, and be treated appropriately after evaluation by a specialist, such as the use of inhaled glucocorticosteroids, e.g. budesonide, and nebulization treatment. In severe cases, intravenous glucocorticosteroids, e.g. dexamethasone, are required, and those who are suspected of bacterial infections need to be treated with anti-infective antibacterial medications, e.g. cefixime. 2. Improper use of voice: inappropriate use of voice, such as prolonged crying, shouting, etc., may lead to hoarseness, and such babies usually have no other abnormalities except hoarseness. This kind of babies usually have no other abnormal symptoms except hoarseness. For treatment, it is necessary to pay attention to rest, avoid the above inappropriate use of voice behavior, drink more water, hoarseness can be gradually relieved. 3. Others: Polyps on the vocal cords may also occur, so it is necessary to pay attention to reasonable use of the voice, avoid irritating substances, and if necessary, require surgical intervention. All of the above medications should be used under the supervision of a physician. It is recommended to consult a specialist for a comprehensive assessment and appropriate intervention.