Anyone ever had a blood blister show up near the previous tumor site? Did it turn out to be anything? I had my tumor cut out 2 1/2 years ago and no problems since. Last night, while brushing my teeth, I noticed a blood blister on the underside of my tongue at the edge of the tumor bed. I am a little nervous about it - but not sure if I should be. I did schedule an appointment later today - but not sure if I am overreacting or not. Anyone ever had this or know if it would be of any concern?