Basics: A cold is a general term for many infections involving a number of different upper airway viruses. It also broadly includes effects on many structures in the head & upper airway.As such it can involve swelling of the Eustachian tube which functions to drain mucus from the middle ear to the throat & allow air to enter occasionally. (ears pop) If the tube swells, it can trap the fluid & dull hearing
Answered 6/22/2019
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