Asthma episode or flare-up:
During an asthma episode:
1.
The muscles around the airways tigh
ten, making the airways smaller.
2.
The lining of the airw
ays becomes swollen.
3.
Thick mucus forms, blocking small airways.
These changes make it hard for
air to flow in and out of the
lungs. You may have one or al
l of the following symptoms: