Nasal congestion at night but not during the day, mostly due to allergic rhinitis, upper respiratory tract infections and other disorders, mainly due to cold air stimulation at night or changes in body position during sleep. Allergic rhinitis patients, at night because of the cold air, insects and mites and other irritants stimulation, so there will be a night patients with nasal congestion serious, while the daytime symptoms significantly alleviate the phenomenon. Patients with upper respiratory tract infections, due to viruses and other pathogens stimulation, so that the nasal secretion increases, when lying on the side, the secretion due to gravity can block the opposite side of the nasal cavity, during the day in the standing position, the general symptoms significantly better. If the patient has a serious nasal congestion at night, you can massage both sides of the nose to promote blood circulation in the nose and relieve the symptoms of nasal congestion. If it still can not be relieved, you can also use drugs for treatment, such as the use of mometasone furoate nasal spray and so on. The above medications need to be used under the guidance of a doctor.