I seem to do that every time I use the glue gun.....not my favorite tool, but it works so good for some things I just can't give up using it.

I remember one time when I just graduated from high school, my parents had driven out to my grandparents house for my grandfather's funeral. For some reason my dad was talking about the tail pipe of the car which was new at the time & I put my finger on the exhaust pipe. It didn't look hot, but boy did it burn my finger really bad. I can definitely relate to the pain you are feeling both from the glue gun & from my other experience. Nothing worse than a burn or a sore finger for any reason because we are always needing to use our fingers & when it's sore, it just keeps getting hurt continually.

Hope your finger is feeling a bit better by now.