Children’s nose is not ventilated, commonly due to adenoid hypertrophy, upper respiratory tract infections (such as rhinitis, sinusitis, etc.), allergic rhinitis and so on. 1. Enlarged adenoids: In children, the adenoids are enlarged and block the posterior nostrils affecting the ventilation of the nasal cavity. Surgical treatment is usually needed to remove the adenoids. 2. Upper respiratory tract infection: that is, we often say cold, usually manifested as the nose is not ventilated, runny nose, sneezing, etc., resulting in the nose is not ventilated because of the nasal mucosa congestion and edema, and more secretions, resulting in a blockage of the nasal cavity, can not be ventilated. You can clean up nasal secretions, hot towel wet compresses on both sides of the nose, and take medication under the guidance of a doctor. 3. Allergic rhinitis: this disease is mainly related to the child’s personal constitution, often occurring after exposure to allergens, manifested in the nose is not ventilated, flowing watery nose, sneezing and so on. Allergic rhinitis is mainly treated by oral anti-allergic drugs, such as cetirizine hydrochloride, loratadine, and nasal spray hormones such as mometasone furoate and other nasal sprays. Children’s noses do not breathe, it is recommended that the hospital visit, a clear diagnosis and follow the doctor’s instructions for treatment.