Asthma is a chronic inflammatory disease that Causes hyperreactivity of the airways of lungs leading to wheezing, shortness of breath, chest tightness, and coughing.
Asthma is common and prevalent worldwide. There is no age bar for it, but nearly 50% of cases develop before the age of 10 years and mostly before age 30. Read more about Causes of Bronchial Asthma.
According to the World Health Organization, it is currently affecting 235 million people approximately worldwide.