Four-month-old baby snoring is an abnormal phenomenon. Mostly related to nasal stenosis, pediatric laryngeal tenderness, and upper respiratory tract infections, it is recommended to consult a doctor promptly to clarify the cause. Common causes and treatment methods 1, nasal stenosis: baby due to nasal stenosis ventilation restrictions, will also lead to snoring, such as nasal septum curvature, need to perform surgery; or when the environment is dry, nasal secretions dry can block the nasal cavity, resulting in less airflow through the baby needs to breathe through the mouth to get oxygen, so the phenomenon of snoring. It is suggested that parents should clean the baby’s nasal secretions in time and increase the humidity of the environment; 2, pediatric laryngeal chondrosis: due to calcium deficiency, the laryngeal cartilage is underdeveloped and softened, resulting in the collapse of the soft tissues in the upper part of the voice box, causing airway obstruction and snoring, most babies grow up with development and gradually improve and heal themselves; 3, upper respiratory tract infection: such as bacterial and viral infections, causing inflammatory reactions in the nose, snoring can occur with fever, coughing and other symptoms. It is recommended to give anti-infective drugs, such as amoxicillin, or nebulization, as prescribed by the doctor. When your baby snores, parents can adjust the baby’s sleeping position and try to sleep on the side to avoid snoring, and seek medical attention to clarify the cause.