I'm an asthma patient since I was 15 years old. It used to be under control, but in the past year, it's gotten worse. When I eat tomatoes, I start getting phlegm, cough, wheezing, and shortness of breath. My doctor told me to use one puff of Seroflo 100 daily. But what I'm really curious about is why I seem to have such quick mucus production. What kind of care should I be taking?