How many days a stuffy nose in a newborn can clear up on its own depends on the cause. Generally, a common cold can be cured in about 7 days, but if it is influenza, the stuffy nose may last longer. Nasal congestion in newborns can be caused by upper respiratory tract infections, which can be categorized into common cold and influenza, and common colds usually heal on their own in about 7 days. But if it is influenza, newborns may be accompanied by fever, coughing, physical discomfort and distress and other symptoms, nasal congestion may be longer, should seek medical attention in a timely manner, under the guidance of the doctor to take standardized treatment. At the same time, the daily need to do a good job of protection, avoid taking newborns to places with high traffic, pay attention to disinfection before contact with newborns, indoor to keep the environment moist, open the windows appropriately ventilated.