ANATOMY

Detailed explanation-1: -The most common asthma triggers include allergies, air pollution and other airborne irritants, other health conditions including respiratory infections, exercise or physical activity, weather and air temperature, strong emotions, and some medicines.

Detailed explanation-2: -Asthma comes in many forms and can develop at any age. Allergic asthma is triggered by allergies. Non-allergic asthma is triggered by irritants in the air. Cough-variant asthma is distinguished by a dry cough.

Detailed explanation-3: -Asthma is a chronic (long-term) condition that affects the airways in the lungs. The airways are tubes that carry air in and out of your lungs. If you have asthma, the airways can become inflamed and narrowed at times. This makes it harder for air to flow out of your airways when you breathe out.

Detailed explanation-4: -Step 1 – mild intermittent asthma. Symptoms fewer than two times a week. Step 2 – mild persistent asthma. Step 3 – moderate persistent asthma. Step 4 – severe persistent asthma.