Asthma is a chronic inflammatory disease of the airways , which play a role several cells, in particular the mast, the eosinophils the T lymphocytes. In subjects predisposed this inflammation causes recurrent episodes of wheezing breath, difficulty breathing, feeling of chest tightness and coughing.
These symptoms are usually associated with widespread but variable broncoostruzione reversible after therapy with bronchodilators or spontaneously. The inflammation also causes an increase in airway response to many stimuli more or less specific.
