I read a few of the articles on here, and I just wanted to share my personal experiance. My asthma comes from my allergies. A lot of people are like this. Whenever I get a sinus infection, I am sure to get asthma. Or if I am around something that makes my allergies act up, I am sure to get asthma...So if you notice that there are things that you are allergic to, that cause you to have a constant wheezy cough..pressure against your chest when you breathe...go get allergy tested.