The nasal cavity of newborns is small and short, with a delicate mucous membrane and no nasal hair, and the blood in the nasal cavity runs vigorously and is more sensitive to stimulation. When stimulated by external cold or hot air, odors, foreign bodies, etc., such as keeping pets or planting flowers at home, resulting in too much pet hair or pollen in the air, the newborn’s organism will have a physiological protective respiratory reflex, i.e. sneezing. No special treatment is needed for this situation. Avoiding pets in the baby’s room and replacing the flowers placed in the baby’s house with green plants can improve the sneezing of newborns. In addition, certain diseases can also cause sneezing in newborns.1. Cold: After catching a cold, bacteria or viruses can stimulate the mucous membrane of the nasal cavity of newborns and cause sneezing symptoms. You should pay attention to keep warm and avoid the newborn from getting cold, you can feed the newborn more warm water, and you can also do symptomatic treatment under the guidance of your doctor; 2. Acute rhinitis: mainly viral infection or bacterial infection secondary to viral cold. When the disease starts, there is a mild chill and fever, general discomfort, burning sensation in the nasopharynx, dryness, itching and sneezing in the nose. The main treatment is to strengthen the nasal care, you can use saline to rinse the nasal cavity, at the same time need to keep the room air temperature and humidity appropriate, most of the newborn baby symptoms can be significantly relieved. However, it is also necessary to pay attention to observation, and if the symptoms worsen, it is necessary to go to the hospital in time. Because of the rapid changes in the condition of newborn babies, the possibility of serious diseases can easily appear; 3, allergic rhinitis: due to the existence of a certain antibody in the body of newborns, when the antibody and external antigen contact will trigger runny nose, sneezing and other symptoms of allergic rhinitis. If the inflammatory response is mild and there are no obvious clinical symptoms, many newborns can heal on their own. In daily life, it is necessary to avoid contact with allergens, such as pet hair and dust in the air. If the symptoms of rhinitis are more pronounced and the inflammatory response is higher, the newborn should be taken to the neonatal unit of the hospital and treated with anti-allergic medication under the guidance of the doctor, while saline can be considered for nasal cleansing.