Asthma is the concept of what?

In a narrow sense, the definition of asthma should be: the body as a result of internal or external allergen or allergens, and other factors, nerve through body fluids and lead to the reversible airway spasm. Clinical manifestations of paroxysmal repeated time and again for chest tightness, wheezing with the sound of breath and difficulty breathing or mainly of those who have both cough. In the broad sense to study the clinical manifestations of asthma by a number of different levels of physiological and pathological changes in the form of the syndrome, such as: bronchial smooth muscle spasm, airway mucosal edema, increased mucus secretion, mucosal cilia dysfunction, bronchial mucous hypertrophy, bronchial mucous embolism And so on, according to a variety of physiological and pathological changes can lead to varying degrees on different levels of the clinical syndrome of asthma, who re-performance of the severe acute asthma status, the only light for the performance of the chest, while others reflected mainly in order to cough. The so-called common asthma, often referring to the narrow definition.