K.S.
Sorry, I dont have any natural or hollistic advice. And Im no treally sure there are any. Since asthma affects the lungs and breathing, I dont think any techniques or herbs or anything else will help except meds. At least Ive never heard of any.
I felt the same way you do when they dx'd my dd w/ asthma. I said NO Way. I dx'd her w/ allergy induced asthma. I think I made up the name by observation of her symptoms and conditions under which they occurred. And given the fact there was no known history of it in our family. So after several years of fighting the doctors about this they have now officially labeled it allergy induced asthma as well. Hers is brought on in the spring and fall. She gets allergy symptoms and then a cold and then the asthma kicks in and then bronchitis. She gets pretty sick. So treatment for her begins in early pre-spring w/ allergy pills and singulair which has some asthma prevention. If she gets into the cold stage we immediately start the inhaler(s). At the first sign. Dont 2nd guess it. She does pretty well if we catch it in time. She did have a few years where she was doing the inhalers year round. But now at age 11 she has only used her inhaler as needed after physical activity...
So, your child could have the same thing, just allergys and if you let it go he could develope asthmatic symptoms making it hard to breathe. Ask your doctor to test him and also ask for allergy meds to see if that wards off the asthmatic symptoms. My daughter tested negative for allergys, but clearly suffers from them. So I am not sure how accurate they are.
I hope this information helps you figure it all out.