Why is wheezing usauly worse when asthmatics exhale?

Wheezing is a high-pitched whistling sound that occurs when breathing. It is usually caused by a narrowing of the airways in the lungs. In asthma, the airways are inflamed and can become swollen and filled with mucus, which can further narrow the airways and make it difficult to breathe.

When asthmatics exhale, the muscles around the airways may tighten, further narrowing the airways and making it even more difficult to breathe. This can cause the wheezing sound to become louder and more pronounced.

Additionally, when asthmatics exhale, the pressure in the lungs decreases, which can cause the airways to narrow even further. This can also worsen the wheezing sound.

In some cases, wheezing may also occur when asthma sufferers inhale, but it is usually worse when they exhale.