Hi Sir I Have Son Of 8yr Old In Age

Hi sir I have son of 8yr old in age from last year whenever there UA seasonal change he gets whising and cough in night.also sometimes he get attacks of coughing that lasted for one hour. Recently we have visited pediatric doctor she suggested use of flohale inhaler asthalin inhaler and have suggested that child has asthma symptoms. Sir how can we make sure that he has asthma symptoms. Secondly does use of two inhalers safe for child.