Thanks for the query.
According to your description that could be bartholin cyst.
will be located near the vaginal opening.
When the duct get s blocked it will form cyst. Infected cyst
will form abscess
. It can recur.
So you once consult gynecologist get examined and take treatment accordingly.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429