Answers: Much of the cause may be due to inheritance. There are studies that show a predisposition to sensitivity and therefore brochospasms. There is a chemical give the name leukotriene that is present contained by the lungs and the more sensitive you are to irritants the more leukotrienes the body produces this in turn triggers the swelling contained by the bronchial tubes for which asthmatics are noted.
You also have to cart into consideration envirionmental factors such as the increasing amount of pollution surrounded by the atmosphere. Another factor is second hand smoke. Though a character may have the predisposition it take a trigger to actually produce the aversion and induce the spasm. We are truly fortunate in that asthma is one of the most treatable diseases on the plant and due to the increased public awareness we are developing more miscellaneous and potent medication that help us to provided increased ability of life for our patients.
The biggest factor is inheritance ( It is believed that the genes linked to asthma involve the lungs and the immune system. ). Environment and things approaching prematurity (when the lungs are not fully developed) also can contribute.
a good site beside info is: http://www.nationaljewish.org/disease-in...
In my families crust it is completely genetic..we can trace back 5 generation of asthma (cause of death on my greatgrandmothers disappearance certificate is asthma).
the basis of bronchial asthma might be infection, allergy, stress and change contained by weather patter (hot afterwards becomes cold environment)