When bronchial tubes are sensitive to irritants, it cause them to inflame and make the breathing difficult. This symptoms is called asthama. Normally when any one suffer from asthama, these are the main symptoms appears such as swelling of the airway lining due to inflaming the airway. Muscle contraction around the air passages and excessive mucus in the airways. In developed countries and now in developing countries so many people have been affected due to air pollution. Even school going children are also become asthama patients.
