What are the symptoms of asthma?
Some of the symptoms are breathing trouble, coughing, and having a tightening in your chest.
How can it be treated?
Staying inside can help since exposure to allergens make.it worse.  Many are prescribed with an albuterol inhaler. 
What else is there to know about it?
It is very common and a long term disease. 
Do you know anyone that has it?
A good friend of mine has it.  It runs in her family.
So it's hereditary?
Its cause has been viewed as a combo of genetics and environmental triggers.