The most common cause of hoarseness in infants and children is pediatric acute laryngitis. If it is pediatric acute laryngitis, parents should pay full attention to this disease because this disease can endanger the life of the child, so once the diagnosis of pediatric acute laryngitis is made, effective measures should be taken immediately to relieve the child’s breathing difficulties. A. Early use of adequate antibiotics to control the infection, glucocorticoids to reduce and eliminate the swelling of the laryngeal mucosa, antibiotics can be used penicillin and cephalosporins. According to the condition, use intramuscular injection or static glucocorticoid, such as dexamethasone. Second, if there is severe laryngeal obstruction, drug treatment does not improve, tracheotomy should be performed in a timely manner. Third, supportive therapy, pay attention to fluid supplementation, maintain water-electrolyte balance, make the child quiet, avoid crying, reduce physical exertion, and reduce respiratory distress.