What is Asthma - Video MD

Asthma is a very common disease in adults and children. The most common symptom of asthma is shortness of breath, but can also cause cough. Asthma is a disease of the bronchial tubes of the lung. The symptoms are due to bronchial obstruction and bronchospasm. Asthma is a very treatable disease, but the symptoms of asthma must be recognized and treated. Dr James Li, the Chairman of Allergic Diseases at Mayo Clinic discusses what is Asthma.