Home Remedy for Asthma A chronic respiratory disease, asthma refers to a condition in which a person faces difficulty in breathing. In this disease, the airways gets constricted and inflamed. While the muscles inside the bronchial walls tighten up, the airways produce extra mucus, thereby blocking the passage of air. An incurable disease, asthma is often triggered when a person is exposed to irritants. From being mild to life-threatening ailment, asthma can affect everyone, right from men and women to children. There are various reasons for the occurrence of asthma. In the following lines, we have provided the main causes and symptoms of asthma.