Many, many sources: The first thing you thing about is a cold, viral infection, or upper respiratory infection (all closely related in definition). However, this could be from multiple things, including allergies, post nasal drainage, or even gerd or acid reflux. Would need a little more info, but those are some places to start thinking about! hope that helps.
Answered 9/29/2016
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A doctor has provided 1 answer
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