One morning I woke to find that my tongue was smeared in black. It has occured several times now even threw the day, my mother looked in my throat and noticed I had black specks on my tonsils. I have no pain but in the area. But now my stools are black also. I have had alot of pain, camping and some diareah, so i've taken pepto bismal for it, that may explain the black stools, but what about my tongue and tonsil?