Asthma Essay

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Asthma Essay The definition of Asthma; a disease of the respiratory system, sometimes caused by allergies, with symptoms including coughing, sudden difficulty in breathing, and a tight feeling in the chest (Encarta® World English Dictionary[North American Edition], 2009). Asthma is a chronic a lung disease that inflames and narrows the airways. The airways of the lungs are the tubes that transport air in and out of the body. Asthma patient's airways are inflamed and sensitive to certain substances. When the airway reacts to these substances the muscles in the airway start tightening and narrowing the airway and prevents the normal amount of air to the lungs. Cells in the airway will start to produce thick mucus that causes more narrowing and that also prevents airflow to the lungs (NHLBI, 2008, para.4). The inflammation and narrowing worsens, breathing becomes more labored and less oxygen is able to pass through, this is called an asthma attack also called a flare up or exacerbation. Asthma is a disease of the lung that inflames and narrows the airways. Asthma causes recurring periods of wheezing (a whistling sound when you breathe), chest tightness, shortness of breath, and coughing. The coughing often occurs at night or early in the morning.Asthma affects people of all ages, but it most often starts during childhood. In the United States, more than 25 million people are known to have asthma. About 7 million of these people are children.OverviewTo understand asthma, it helps to know how the airways work. The airways are tubes that carry air into and out of your lungs. People who have asthma have inflamed airways. This makes them swollen and very sensitive. They tend to react strongly to certain inhaled substances.When the airways react, the muscles around them tighten. This narrows the airways, causing less air to flow into the lungs. The swelling also can

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