The child’s nose does not breathe at night sleep well may be allergic rhinitis, upper respiratory tract infection, adenoid hypertrophy and other causes, need to be clearly diagnosed under the guidance of the doctor for targeted treatment, such as drug therapy, surgical treatment. 1. Allergic rhinitis: children may be allergic to airborne dust or other allergens, which can lead to the child’s nose, sneezing, etc. Generally, allergens can be avoided by avoiding contact with allergens, the use of antihistamines, decongestants, sodium cromoglycate, leukotriene receptor antagonists, glucocorticosteroids and other medications, such as cetirizine and other drugs to carry out the treatment. 2. Upper respiratory tract infection: the main pathogen is a virus, a few are caused by bacteria, to the nasopharyngeal mucosal inflammation as the main manifestation, including coughing, runny nose, sneezing, nasal congestion and other symptoms, so that the child sleeps with a blocked nose and breathlessness. Children can follow the doctor’s instructions to use children’s cold granules, antiviral oral solution and other drugs to relieve. 3. Adenoid hypertrophy: usually the adenoids are located in the back of the nose, when the patient sleeps, the root of the tongue falls back, may be blocked with the enlarged adenoids together with the respiratory tract, resulting in the child’s nose can not be ventilated at night when sleeping. In this case, a nasal endoscopy is needed, and if the symptoms are severe, such as difficulty breathing, surgery is needed to remove part of the enlarged adenoids. This symptom alone is not enough to diagnose the disease, and other factors cannot be ruled out. Parents are advised to bring their children to the doctor in time for clarification of the cause of the disease and to give targeted treatment. All of the above medications should be used under the supervision of a doctor.