Hello and hope you are doing well.
Her symptoms could be due to Asthma. Lung function tests will help with the evaluation. The number of children having asthmatic attacks is on the increase now. The way in which to tackle asthma is at two levels, at the preventive level and at the therapeutic level. Please discuss this with your doctor am sure he will provide further assistance.
The goal of therapy must be to keep the child symptom free even during exercise. The child must carry on all normal activities and physical activity will increase her appetite and in turn, her weight. The good news is that children who develop it early, outgrow the problem early too.
Hope this helped and do keep us posted.
There has been many episodes of this kind of sickness in children the last year or two, in fact children are 20% sicker than a decade ago. It could be an allergic reaction to something .do some research online there is much up there about this .Its not only children adults are sick aswell .