What causes asthma or how is it spread?

What Causes Asthma?

Asthma is a chronic inflammatory disease of the airways. It causes episodes of wheezing, coughing, chest tightness, and shortness of breath.

The exact cause of asthma is unknown, but it is thought to be caused by a combination of factors, including:

* Genetics: Asthma tends to run in families. If you have a parent or sibling with asthma, you are more likely to develop it yourself.

* Environmental triggers: Certain environmental triggers can cause asthma attacks in people who are already predisposed to the disease. These triggers include:

* Allergens, such as pollen, dust mites, pet dander, and mold

* Irritants, such as smoke, pollution, and chemicals

* Exercise

* Cold air

* Stress

* Infections: Respiratory infections, such as the common cold and flu, can trigger asthma attacks in some people.

How is Asthma Spread?

Asthma is not contagious. It is not spread from person to person.