Hi,
Asthma is not a confirmed hereditary disease however there are increased chances when compared to a child with no family history. And also please remember most of the childhood asthma patients become asymptomatic by adolescence.

Dear Patient, I totally understand your concern. As far as Asthma is concerned, its mode of inheritance is polygenetic, that means, more than one gene is responsible for inheritance of asthma from parents to children. This certainly puts the child in a higher risk group for asthma. But this DOESNOT mean the child will be asthmatic for sure. The genes for asthma are mostly triggered by environmental factors , ( like smoke, dust, pollens, cold air, strenous exercise etc ) and protection of children from such factors will delay the onset and reduce severity of the diseases to a considerable extent. I hope this answer addresses your concern, take care of yourself and your son. Good day!