The Things you need to know about asthma
Asthma is a chronic disease of the airways that makes breathing difficult. With asthma, there is inflammation of the air passages that result in a temporary narrowing of the airways that carry oxygen to the lungs. This results in asthma symptoms, including coughing, wheezing, shortness of breath, and chest tightness. Some people refer to asthma as “bronchial asthma.”
Even though there are seemingly miraculous treatments for asthma symptoms, asthma is still a serious -- even dangerous -- disease that affects more than 22 million Americans and causes nearly two million emergency room visits ever year. With proper asthma treatment, you can live well with this health condition. Yet inadequate asthma treatment limits the ability to exercise and be active. Poorly controlled asthma can lead to multiple visits to the emergency room and even hospital admission, which can affect your performance at home or at work.
There are three main features of asthma:
- Airway obstruction. During normal breathing, the bands of muscle that surround the airways are relaxed, and air moves freely. However, in people with asthma, allergy-causing substances and environmental triggers make the bands of muscle surrounding the airways tighten, and air cannot move freely. Less air causes a person to feel short of breath, and the air moving through the tightened airways causes a whistling sound known as wheezing.(Fortunately, this airway narrowing is reversible, a feature that distinguishes asthma from other lung diseases such as bronchitis or emphysema.)
- Inflammation. People with asthma have red and swollen bronchial tubes. This inflammation is thought to contribute greatly to the long-term damage that asthma can cause to the lungs. Therefore, treating this inflammation is key to managing asthma in the end.
- Airway irritability. The airways of people with asthma are extremely sensitive. The airways tend to overreact and narrow due to even the slightest triggers such as pollen, animal dander, dust or fumes.