An asthma trigger is anything that makes your asthma worse. When you encounter one of your triggers, it can cause a sudden worsening of asthma symptoms, which is often called an asthma attack, episode, or flare-up. […]
An asthma trigger is anything that makes your asthma worse. When you encounter one of your triggers, it can cause a sudden worsening of asthma symptoms, which is often called an asthma attack, episode, or flare-up. […]