Asthma is a chronic inflammatory disease of the airways. The chronic inflammation causes the airways to swell, which makes them highly sensitive and narrow. Swelling may occur randomly or after exposure to triggers like allergies, smoke, air pollution, and exercise. The main symptoms are wheezing, breathlessness, and coughing that can temporarily worsen and give asthma attacks.
How many have asthma?
Asthma is one of the most prevalent chronic diseases, with more than 300 million affected worldwide. Asthma affects people of all ages and is often starts during childhood, although it also can be developed for the first time in adults.
How is asthma treated?
The symptoms during asthma can usually be controlled with the treatment of reliever or preventer inhalers. But patients who have severe asthma can have ongoing problems and difficulties controlling their asthma symptoms with treatment causing the risk of asthma attacks.
How is asthma diagnosed?
The current diagnosis of asthma is based on a variably expiratory airflow limitation measured by forced expiratory volume in 1 second (FEV1), family history, and symptoms.