Re: Gum sore w/ Picture
The picture was sort of fuzzy, but I have to go along with jeni777. It appears to be an abscess forming and trying to come through the gum in a fistual type opening.
Your dentist should have left a covering dentist while he is on vacation to take care of his emergency patients. I urge you to call and find out, and either get to see him/her or get covering antibiotics until you can see your regular dentist.
Hope this helps and you are not in any pain. The problem with an abscess is that it can erupt at any time. Do make that call ASAP.
Best to you,