Definition and Causes of Asthma

Asthma is defined as a long-term disease that affects breathing and the lungs. During an attack, the air passages are inflamed, causing coughing, shortness of breath, wheezing and tightness in the chest. Asthma occurs due to several causes.

Allergies

• People affected by airborne allergens such as mold, dust, grass, trees, pollen and animal dander are more susceptible to asthma attacks.

Smoking

• Smokers are more likely asthma candidates than nonsmokers, and children with parents who smoke can also be more likely to have asthma.

Infections

• When children have respiratory infections at an early age, asthma is a common result. These infections include sinus infections, colds, bronchitis and the flu.

Environment

• Children in certain environments are more likely to have asthma. The negative stimulus sometimes comes from pollutants in outdoor air. Other times, the asthma trigger is harmful household cleaning products.

Family History

• Asthma is thought to be hereditary; some parents with asthma have children who develop asthma.

Combination

• According to the National Heart Lung and Blood Institute, medical experts believe that a combination of the above-listed factors contributes to an asthma diagnosis.