I can only relay my experience. I went to my Ob/Gyn and he diagnosed the bartholin's cyst. We opted to do nothing unless it became a problem ie. painful or showed signs of infection/abcess. I had it for a REALLY long time. Last Dec. or so, without any new symptoms, I opted to have it drained. I was just tired of it being there and worrying what it would eventually do.

The draining procedure was no big deal, in-office and completed in just a few minutes. It did not require "numbing" or anything...there was an initial prick and then nothing. I did opt to have the fluid sent to the lab, just to make sure everything was a-okay.

I was very happy that I had it drained, it gave me back some "peace of mind". There is no guarantee that it will not return again, but so far so good.

If I were you, I'd just have it checked out to be certain that is what it is.