1 year 5 months old baby repeated cough, consider the possibility of pathologic cough, there may be upper respiratory tract infection, allergic cough or cough variant asthma. 1. Upper respiratory tract infection: upper respiratory tract infection, can be manifested in the recurrent symptoms of coughing, but recurrent coughing time will not be too long, and usually there are other symptoms, such as nasal congestion, runny nose, and so on. 2. Allergic cough: babies are allergic to cold or hot gases, pollen, irritating gases, etc., which makes them prone to recurrent coughing. 3. Cough variant asthma: cough variant asthma is a special type of asthma, clinical symptoms are mainly dry cough, if the recurrent cough for more than 4 weeks, and often in the exercise, night or early morning and other moments of attack or aggravation, there is a possible cough variant asthma. 1 year old 5 months baby recurrent cough, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.