Phlegm is mucus: The phlegm or mucus you secrete is normal even in a non- diseased state. Even without an illness you can produce excess mucus because of allergy - allergic rhinitis. Or you can produce it without an identifiable irritant - non-allergic rhinitis. This is a very common thing that i see patients for on a daily basis... It may just be you.
Answered 10/3/2016
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