When nasal congestion occurs in children at night, it may be due to a dry environment and nasal secretions blocking the nostrils. Parents can use a moist cotton swab to gently remove the secretions, and at the same time, it is recommended to improve the air humidity. If the nasal congestion does not improve, and accompanied by other symptoms, it is considered pathological factors, common causes include upper respiratory tract infection, rhinitis, sinusitis, allergic rhinitis, adenoid hypertrophy, etc., at this time, you need to take the child to the hospital for a comprehensive examination and treatment for the disease. 1, cold: mostly manifested as nasal congestion, runny nose and other symptoms, the lighter to the general symptomatic treatment, timely cleaning of secretions, warm compresses, cleaning the nasal cavity, etc., pay attention to rest, pay attention to the nasal cavity. If the symptoms are not relieved and have a tendency to worsen, children over 4 years old need to follow medical advice to apply drugs to relieve nasal congestion; 2, rhinitis: if the baby has allergic rhinitis, when exposed to allergenic substances, the symptoms of nasal congestion will appear. Parents need to determine whether there are certain items that cause allergies in children, and go to the hospital to do allergen testing to exclude allergenic factors, and apply antihistamines as prescribed by the doctor. If the infection is sinusitis, it may be necessary to apply anti-infective drugs for treatment; 3. Adenoid hypertrophy: the hypertrophied glands can block the child’s airway, resulting in nasal congestion and breathing difficulties. The symptoms are more pronounced at night when the child sleeps, as he or she remains in a flat position. When the situation is serious, sleep apnea, adenoid face and other adverse consequences can occur, so timely consultation is required, generally through the surgical removal of treatment; 4, other: if the baby’s nasopharynx has tumors, polyps or nasal foreign bodies, may also appear nasal congestion, need timely microscopic examination. In general, the removal of foreign bodies, tumors, polyps, symptoms can be relieved. In daily life, parents should frequently wash and expose their children’s pillows, covers and other intimate items to keep the child’s sleeping environment clean and dim, and ensure air circulation and relatively moist air. In addition, observe whether there are any nasal stools in the child’s nasal cavity, if there are more nasal stools, they will easily block the nostrils and cause nasal congestion, and need to be removed in time.