When you know how to control asthma, it no longer controls you. Asthma is a lung disease. It can be life threatening. Asthma is chronic. In other words, you live with it every day.
Asthma causes breathing problems.
These breathing problems are called attacks or episodes of asthma. But they do know that once you have it, your lungs react to things that can start an asthma attack. This mucus is very thick and sticky. It tends to clog up the tubes. The air tubes tend to swell, just as skin swells when you get a scrape.