s surrounded the airways and the contraction of these muscles allows airways to selectively direct the flow of air.
             The normal airway junction designed to protect the lungs becomes excessive in a person with asthma. The muscles tighten (bronchospasm) and the mucosa becomes inflamed and begins to swell, which reduces the diameter of the airways. In addition, mucus production is increased, sometimes forming sticky plugs in the bronchial tubes. Asthma is a chronic condition that is marked by acute episodes where breathing is a problem. These episodes, or "asthma attacks", are gradually progressive over a period of hours or days before they become noticeable, when though they may feel as if they happen suddenly.
             All asthma patients have inflamed airways when their asthma is not under control. This inflammationis caused by a variety of triggers. Each aethmatic has his or her own unique combination of triggers that cause their asthma episodes. The common triggers of asthma are listed and detailed below:
             Running can trigger an attack on over 80% of children with asthma. Bronchodialator medications used prior to exercise can prevent most of these episodes. Swimming seems to be the least asthma-provoking form of exercise.
             Respiratory infections are a frequent cause of asthma that cant last for days. Anytime and asthmatic gets a cold, flu, sinus, infection, or ear infection, asthma symptoms may worsen.
             Allergies that cause asthma include common indoor inhalants (house dust, feathers, mold, pets), outdoor inhalants (molds and pollens), or ingested food (milk, soy egg, etc.).
             Cigarette smoke , air pollution, strong odors, perfume, aerosol sprays, and paint fumes are just some of the substances which irritate the tissues of the lungs and upper airways. The reaction produced by these irritants can be identical to those produced by al
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