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[reason]

Trachea patients are allergic to bronchus, and they will react with a little stimulation. When the bronchus is stimulated, it will cause contraction, bronchial mucosa swelling and mucus secretion. After a series of actions, the inner diameter of the bronchus will narrow. In this way, only a small amount of air can pass through, which causes wheezing and dyspnea.

The inducement of asthma (the chance to stimulate an attack) is caused by many reasons. In addition to dust, pollen and other foreign bodies, cold symptoms, bronchitis and other respiratory infections, temperature changes and various pressures are also the causes of this disease. The causes of bronchial allergy include allergy theory, virus and bacterial infection theory, autonomic nervous disorder, endocrine theory and so on.