Asthma is a chronic inflammation of the lungs in which the airways (bronchi) are reversibly narrowed. It can also be defines as a commonchronic disorder of the airways characterized by variable and recurring symptoms, airflow obstruction, bronchial hyperresponsiveness (bronchospasm), and an underlying inflammation. During attacks (exacerbations), the smooth muscle cells in the bronchi constrict, and the airways become inflamed and swollen. Asthma causes recurring periods of wheezing (a whistling sound when you breathe), chest tightness, shortness of breath, and coughing.

There are many irritants that can cause your airways to narrow. The causes differ depending on the type of asthma; allergic or non-allergic asthma. Allergic asthma usually begins in people under the age of 35. For allergic asthma, here are some of the things that can irritate your asthma.Asthma cannot be cured. It can be flare up at any time. But with today's knowledge and treatments, most people who have asthma are able to manage the disease. They can live normal, active lives and sleep through the night without interruption from asthma.