The baby snot backflow cause cough may be upper respiratory tract infection, physiological stress and other reasons, you can use phlegm drugs, antibiotic drugs, physical therapy and other methods to reduce symptoms. 1. Upper respiratory tract infection: the most common cause of coughing due to nasal discharge is upper respiratory tract infection, pay attention to the temperature of the bedroom is not too low, pay attention to warmth, to avoid getting cold, etc., if necessary, can be taken under the guidance of a doctor, such as pediatric aminophenol xuanamin granules and other anti-flu medication to alleviate the symptoms. 2. Physiological stress: If the child’s normal nasal secretions backflow caused by the tracheal stress response, can also be manifested as a cough, can be through physical therapy, to the baby nasal massage, hot compresses to make the baby’s discomfort symptoms for relief. If the baby snot increase, cough symptoms are not relieved, there may be other causes, it is recommended to go to the hospital in a timely manner, clear reasons to give targeted treatment. To use drugs under the guidance of the doctor, avoid unauthorized use of drugs.