" Asthma is a respiratory disease that deals with the inflammation of the airways in the lungs. This causes the airways to become swollen and produce extra mucus. It is a long-term disease that affected mostly children, but adults can have it too. Causes of Asthma Some of the most common types of asthma are: Allergy-induced asthma: made to happen by airborne substances Exercise-induced asthma Occupational asthma: inhalation of potentially hazardous substances, gases or dust Other ...