Anything: Can be almost anything from postnasal drip to tonsiliths to pneumonia. Try Mucinex (guaifenesin) to see if it improves. If not it may need to be cultured.
Answered 2/17/2015
5.3k views
Smoker?: If you are a smoker, it cold be that, otherwise it's difficult to say. Could be blood or some other dark material. You may want to see your dentist to examine it.
Answered 3/26/2013
5.3k views
Do you smoke?: It could be the byproducts of smoke mixing with mucus. It could be clotted blood mixing with the mucus. It might be a good idea to have it checked out.
Answered 11/27/2017
5.3k views
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