Asthma is a lung disease that causes you to have difficulty breathing. More than 20 million Americans suffer from asthma. People with asthma may have airways that are inflamed. This means that they swell and produce large amounts of thick mucus. They are also overly sensitive to certain things like dust, cigarette smoke or even exercise, which are called triggers.
This sensitivity causes the muscles that surround the airways to tighten up. The combination of airway inflammation and muscle tightening narrows the airways and makes it difficult for air to move through. This is what happens to a person’s lungs during an asthma attack.
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