my son is 6 years old and suffers cronic astma and is also on the waiting list to have his tonsils and adenoids removed, in the last 6 weeks every time he runs around and full on plays he comes running to me saying he cant breath I can tell he is struggling to breath and I give him his ventolin although he isn t weazing it seems to help him straight away but my concern is every time he runs around this happens and the ventolin seems to open his airways up but why is he needing it all of a sudden has it got to do with his oxygen level?