About 6 months ago, I got 2 black spots in my mouth, both no more than 1mm and perfectly formed,and accompanied by a feeling of a lump in my throat. They disappeared within 24 hours. 2 days ago the same thing happened, only it was 1 small black spot this time. The black spot was gone in 24 hours and the lump in my throat is feeling better. From what I can make out from various forums etc, it doesn't sound like cancer but its not an almalgam tattoo judging by the other pictures. Does anyone have any clues as to what this is? I don't know if this is purely coincidence but both times have happened right after I have returned from a holiday.