My 5 year old has had asthma since he was 18 months old. It sounds like the same kind, more of a viral-induced asthma, rather than activity-induced. For my DS, if he is having a mild episode, sometimes warm water and honey will calm it. If it is worse (like it is right now), we have taken a more aggressive approach. We do give him prednisone and flovent, as well as his albuterol inhaler and/or nebulizer. Ever since he started drinking milk (grass-fed cows) from a local dairy, which is lightly pasteurized, but not homogenized, he has had way fewer episodes. Before that, he had spent four separate overnight stays in the hospital. I've heard that raw milk can help a lot, but it is really expensive where we live, so we are doing the next best thing...and it seems to be helping. Also, vitamin D can help prevent asthma. Especially in the winter, we make sure to supplement with vitamin D.