Asthma is a respiratory condition marked by spasms of the bronchi in the lungs, which causes difficulties in breathing. Asthma causes recurring periods of wheezing, chest tightness, shortness of breath, and coughing. The coughing often occurs at night or early in the morning. People who have asthma have inflamed airways, making them swollen and very sensitive; they tend to react strongly to certain inhaled substances. When the airways react, the muscles around them tighten. This narrows the airways, causing less air to flow into the lungs. Cells in the airways might produce more mucus than usual; this chain reaction can result in asthma symptoms. Symptoms can happen each time the airways are inflamed.
There are many factors which contribute to asthma, such as:
- low birth weight
- exposure to tobacco smoke
- allergies
- pollution
- pregnancy
- stress
- genes
- airway hyperactivity
- atopy
Some triggers:
- mould
- animal dander
- pollen
- cockroaches
- dust mites
- chemicals, fumes, odours
- respiratory viral infections
- weather
- smog
- excessive, strenuous physical activity
Although asthma cannot be cured, it can be controlled by avoiding asthma triggers, taking medication, and following an asthma action plan.
No comments:
Post a Comment