4-year-old baby cough hoarse should consider the problem of acute laryngitis, treatment should pay attention to the following points: First, anti-infective treatment for the cause, if there is a basis for bacterial infection, should be taken orally or intravenously with antibiotics, commonly used cephalosporin antibiotic treatment, if the viral infection caused by the interferon spray can be used to spray the throat with a local spray laryngeal antiviral treatment. Second, symptomatic supportive treatment, cough with phlegm should be taken orally to relieve cough and phlegm class of drugs, Western medicine or proprietary Chinese medicine can be. 3rd, should be to reduce laryngeal edema treatment, can choose budesonide nebulizer solution to do nebulizer treatment, can also be at the same time or alone oral prednisone tablets to reduce laryngeal edema. 4th, closely observe the changes of the condition, once the recurrence of high fever, poor mental health, cough and shortness of breath aggravation of the situation, should be the first time to go to the hospital to see the emergency department of pediatrics or otorhinolaryngology emergency.