Asthma is a chronic inflammation of the trachea with [Chronic inflammatory] As a result, a cell such as mast cell, eosinophils, T-lymphocyte, macrophage, neutrophil. Accumulate at the bronchial lining. The lining of the bronchial walls react to allergens. And the environment than normal [bronchial. hyper-reactivity], the result of inflammation of bronchial mucosa are bold. With a bronchial muscle contraction. Patients with cough, chest wheezing. And dyspnea Dyspnea will occur immediately upon exposure to allergens