A member asked:

Neg allergy testing, successful sinus surgery, use daily saline rinse but chronic copious thick post nasal drip for years. what are possible reasons?

A doctor has provided 1 answer

Allergy?: Many sufferers of chronic sinusitis are made miserable by environmental allergens that aren't on a standard allergy screen, or show a false negative reaction. I suggest repeat testing along the way to rule out any false negatives. Surgery can affect secretions and ciliary function on a sort-term(1-3 days) basis.

Answered 10/26/2014

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