Pediatric laryngitis needs to be judged according to the degree of hoarseness, laryngeal stridor, respiratory rhythm and other symptoms, there is no such thing as the first few days of severity. Pediatric laryngeal cavity is narrower than adults, where the mucous membrane is soft and rich in blood vessels and lymph, the mucous membrane is very easy to become congested and swollen when infected, and the severity of the infection will cause the laryngeal cavity to varying degrees of narrowing. Laryngitis is usually characterized by fever and hoarseness, barking cough and wheezing. Acute laryngitis is usually mild during the day and tends to worsen at night. When the mucosal edema under the vocal folds increases, inspiratory laryngeal stridor can occur, and in severe cases, it can cause laryngeal obstruction, with shortness of breath, inability to make a sound, cyanosis of the lips and mouth, restlessness, or pallor. When the above symptoms appear, it suggests that the child’s condition is more serious must go to the hospital immediately. Children with acute laryngitis, it is recommended to actively go to the hospital, do not wait until the condition is serious, easy to have the risk of suffocation.