What Is an Asthma Attack? An asthma attack is a sudden worsening of asthma symptoms caused by the tightening of muscles around your airways. This tightening is called a bronchospasm. During the asthma ...

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

Asthma is a respiratory condition that’s characterized by inflammation of the airways. According to the Centers for Disease Control and Prevention (CDC), asthma is a common childhood condition that ...

Exercise-induced asthma is triggered by exercise or physical exertion. Many people with asthma have some symptoms with exercise. But there are many people without asthma, including Olympic athletes, ...

Though they’re separate conditions, allergic rhinitis and asthma are both atopic diseases. Allergies can trigger asthma, and having asthma can increase your risk for allergic rhinitis. Allergic ...