- May 2, 2001
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My stomach is really uneasy and i just generally feel horrible, the main thing concerning me though is that im coughing up a dark gray/black substance up and i dont know what in the world it could be. I've just brushed my teeth several times along with mouthwash each time and its still there. I've never smoked or anything like that in my life in case that has anything to do with it. can anyone help me out and tell me what this probably is?