The reaction of airways makes the muscles around them tighten
causing the airways to narrow, allowing less flow of air to the
lungs. This tightening is often called "bronchoconstriction," and it
can make it hard for us to breathe. The cells in the airways produce more mucus (sticky
thick liquid) than normal, which can further narrow the airways.
The occurrence of this chain reaction results in the symptoms of asthma.
Symptoms can happen each time the airways are irritated. When symptoms
become intense and/or additional symptoms appear, this is called an
asthma attack. Asthma attacks are also called as flare-ups or
Asthma can affect people of all ages, but it most often
starts in the childhood.
Causes and Care
Cholesterol: Effects and Control
Causes and Symptoms
and its constituents