Asthma is a long-term (chronic) disease of the respiratory
system that causes inflammation and spasm or tightening in the
bronchial tubes, which carry air to the lungs. The inflammation
causes periodic episodes of difficulty breathing, wheezing,
chest tightness, and coughing. Although asthma cannot be cured,
most people can control their asthma by following a plan,
avoiding triggers, and taking medicine. Asthma often begins
during childhood and may last throughout a person's life. The
cause of asthma is not clearly known. It is more common in
people who also have allergies. eMedicineHealth Medical
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