But over the past few months ive been spitting up this black substance after clearing my throat. It occurs mostly in the morning but it still goes on throughout the day every now and then. Over the past few years or so I smoked marijuana probably 5 days a week but ive gone cold turkey for the past month. I figured it was just from the smoking but I thought by now that most of that stuff would be cleared out of my system. Do you think its possible that the stuff im spitting out could be the result of something more serious? If anyone has any answers thatd be fantastic, thanks alot!