<p>It's just the case for your son. Several of my friends here had the same after age 13, had pulmonary tests or the methacholine challenge tests and were deemed fine. While I didn't have asthma, I did have inhalers prescribed my junior year of high school. So, they did pulmonary tests and I blew them away taking away any potential DQs. </p>
<p>Don't look at the time as wasted. It was a learning experience, you guys may have regretted not trying at least.</p>