What is "non-allergic asthma"?

What is "non-allergic asthma"?

William Berger (Allergist and Immunologist) gives expert video advice on: What is "asthma"?; Can people die from asthma?; What causes asthma? and more...

Although allergies are very common triggers of asthma, there's a certain population of asthma patients that don't have allergies. That is seen more often in the older population - forty and older. It's important to know that you don't have to have allergies to have asthma, you can have non-allergic triggers. We know that infection is a very common cause, especially sinus infections. We know that reflux- what people think of as heartburn, can be a trigger of asthma. Exercise can be a trigger. So not just allergies, non-allergic factors can be important triggers in causing you to have your asthma symptoms.