A 47-year-old female asked:
What can cause chronic bronchitis with normal lung function test and no relation to allergy or infectious disease?
1 doctor answer
Dr. John Chiu answered
56 years experience in Allergy and Immunology
Tobacco: Tobacco smoking by far is the most common cause in the absence of allergy or infection. Air pollution is also a strong suspect although the link is not as well proven as with tobacco.
Answered on Apr 11, 2016
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