Newborn infants sneezing is considered to be related to physiological factors such as exposure to cold air, dust stimulation, and also allergic rhinitis, influenza and other diseases. 1. Physiological factors: cold air stimulation of the nasal mucosa, dust stimulation, inhalation of irritating gases, etc., can cause newborn babies to sneeze. 2. Allergic rhinitis: the disease is related to heredity, inhalant allergens, ingested allergens and so on. When a newborn baby suffers from allergic rhinitis, it may manifest as nasal itching, paroxysmal sneezing, flowing a lot of watery nasal mucus, nasal congestion and so on. 3. Influenza: Influenza is mainly caused by influenza virus infection, and common symptoms include high fever, headache, body fatigue, body aches and pains, and coughing, runny nose, sneezing and nasal congestion. There are many causes of sneezing in newborn babies. If sneezing persists or is accompanied by other discomforts, you should consult a doctor in time.