How does Air pollution effect sufferers of asthma??

Introduction
Asthma occurs when the main air passages of your lungs, the bronchial tubes, become inflamed. The muscles of the bronchial walls tighten, and cells in the lungs produce extra mucus further narrowing your airways. This can cause minor wheezing to severe difficulty in breathing. In some cases, your breathing may be so labored that an asthma attack becomes life-threatening.

Asthma is a chronic but treatable condition. You can manage your condition much like someone manages diabetes or heart disease. You and your doctor can work together to control asthma, reduce the severity and frequency of attacks and help maintain a normal, active life.


Causes
Asthma is probably due to a combination of environmental and genetic factors. You're more likely to develop asthma if it runs in your family and if you're sensitive to environmental allergens or irritants. Early, frequent infections and chronic exposure to secondhand smoke or certain allergens may increase your chances of developing asthma.

Exposure to various allergens and irritants may trigger your asthma symptoms. The following are common things that trigger asthma symptoms:

Allergens, such as pollen, animal dander or mold

Cockroaches and dust mites

Air pollutants and irritants

Smoke

Strong odors or scented products or chemicals

Respiratory infections, including the common cold

Physical exertion, including exercise
Strong emotions and stress

Cold air

Certain medications, including beta blockers, aspirin and other nonsteroidal anti-inflammatory drugs

Sulfites, preservatives added to some perishable foods

Gastroesophageal reflux disease (GERD), a condition in which stomach acids back up into your esophagus. GERD may trigger an asthma attack or make an attack worse.

Sinusitis