Asthma is a chronic inflammatory disease in which the airways become sensitive to allergens or irritants. When the airways are exposed to such substances, the lining of the air passages become swollen and inflamed. In addition, the muscles around the airways tighten and there is an increase in mucus production in the lining. These factors narrow the passage of air in and out of the lungs and cause an obstruction in breathing.

Bronchial Asthma is an inflammatory lung disease in which an obstructive disturbance of ventilation occurs in the respiratory passage. Any external stimuli like exposure to perfume, moist air, exertion, warm air, cold air, pollen, dander, animal fur, can be triggers for asthma. In certain cases, even mental or emotional stress can be a trigger for a bronchial asthma attack. The attacks in this condition usually occur in the morning, along with a feeling of anxiety, making it difficult for asthmatics to breathe.