I'm usually in the fibromyalgia forum but I also deal with asthma symptoms and allergies. I'd like to share with you what has helped me. I use to suffer with them year round.
I take supplements to strengthen my immune system.
I eat a healthy diet to keep my immune system strong.
I stay away from passive cigarette smoke.
I stay away from pets.
I can't be around a lot of dust.
If I have diary products my allergy and asthma symptoms become much worse. I heard from a doctor years ago that dairy products increase a person's phlegm which makes allergy and asthma symptoms worse.