Allergy is the Cause

My son has been experiencing bouts of cough since he was 2 months old. Doctor told me that the cough is due to pollution related allergy. He also asked me if anyone in the family has asthma. I told him that my mother-in law suffers from asthma. ( She carries a evergo oxygen concentrator all the time with her). When I asked if my son will also need nebulizer or inhaler, the doctor reassured my that most of the children get allergy related cough during the harvest season, and it is not a dangerous condition.