Asthma is a chronic pulmonary disorder characterized by the narrowing of airway passages leading to the lung, including the nasal passageways, mouth, nose, and larynx, which causes difficulty breathing. Certain triggers such as seasonal, environment or food-related allergies may irritate the immune system and cause an asthma attack in which the airway passages close and the person affected has trouble breathing. Research shows the following tips to Prevent Asthma Attacks.