Causes of Asthma. Although research has revealed much about asthma over recent decades, we still don’t really understand what causes the disease. We have more and more pieces of intriguing information about asthma, but we don’t know how those pieces will end up fitting together.
Symptoms. For some people, an allergic reaction to a particular food may be uncomfortable but not severe. For other people, an allergic food reaction can be frightening and even life-threatening.