you have posted your question on the rheumatoid arthritis site where we focus on this particular form of inflammatory arthritis. We have a great sites on COPD and allergies where the Health Guides and community may be better able to answer your question.
in general, though, I would suggest that you keep a symptom diary for 3 to 4 weeks. Write down how you feel every day what you eat, drink, do, what the weather's like, what kind of medication you take, etc. Over time, this will help you establish patterns between your symptoms and what else is going on in your life. Triggers to flares in symptoms are individual between different people - what triggers my asthma may not trigger yours. It is, however, fairly common for any allergies you may have to also trigger your asthma. For instance, I am allergic to tomatoes and when I eat them, my asthma flares, as well.
It is also good idea to talk to your family doctor or specialist about your questions. You should also check out the websites and resources offered by the Asthma and Allergy Association of America.