have been having pains on left side of my head, down into my jaw giving me toothaches. have swollen lymph node under jaw on left side and have found an unexplainable knot on top left side of my head that is a little tender. now, keep breaking out with bumps that look like mosquito bites but don't itch and go away after about a day and then pop up somewhere else. i'm worried about the knot, someone suggested cellulitis but it's not infected, it's under the skin. can all of this be related? any suggestions as to what it could be?