Asthma (also known as allergic airway disease) is a condition characterized by inflammation of the bronchial tubes. During an asthma attack, allergic reaction leads to inflammation, which causes the patient's bronchial tubes to swell and narrow, with excess mucus secretions. As a result, normal breathing becomes restricted. In very severe cases, patients may even die of suffocation. Asthma can cause chronic coughing or intermittent breathing difficulties, adversely affecting the daily lives of patients and their family.

As yet, there is no cure for asthma. However, with adequate care and regular medication as prescribed by a doctor, asthma can be effectively controlled and quality of life can be improved.