Asthma is a common breathing problem that makes it hard to breathe. It happens because the tubes that carry air in your lungs get swollen and narrow.

Signs of asthma include feeling out of breath, wheezing (a whistling sound when you breathe), coughing, and having a tight chest. Sometimes, these symptoms get really bad and cause an asthma attack.

Ventolin Evohaler is a popular medicine you breathe in to help with asthma. It works quickly to open up your airways and relax the muscles in your breathing system, making it easier to breathe.