Many causes: there are many causes from an upper respiratory infection (cold), allergies, or gastric/stomach reflux which irritates the back of the throat producing mucous. Sometimes a bronchitis can do it. If you fever then drink more fluids, take some Mucinex (guaifenesin) OTC and sometimes some salt water gargles If fever or dark green color to the mucous then see provider
Answered 8/14/2016
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