I had a glucose tolerance test this morning. Before the lab tested me after the first hour, I had what looked like a bruise at the base of my middle finger. The finger was numb as well. Later, it looked like the bruise slowly moved up the finger toward the tip and then disappeared. Several hours later, it came back. I also have had what looks like bruises appear at the base of my thumbs, palm side, along with tingling and a warm sensation up to my elbows.