What causes asthma?

Asthma is a genetic disease and those suffering from it are born with it

but there are some triggers that cause the symptoms of the disease to become unmanageable.

Allergens are one of the triggers of asthma. Respiratory infections can also cause asthma. Extreme weather with dry wind, cold and sudden change in weather is

also a trigger. Asthma can also be triggered while expressing strong emotions.

Some medicines are also known to cause asthma. Tobacco smoke, obesity, pregnancy and stress are some of the other triggers of asthma.