Hi, Welcome to HCM and thanks for asking your query here Medical history you provided is strongly suggestive of an vaginal Abscess more specifically it could be a Bartholin s Abscess it Occurs when duct of Bartholin s gland located either side of vaginal opening become infected and it needs thorough medical examination and it may need a minor surgical procedure to drain it completely You may help yourself by having sitz bath ( Sit in the bathtub in a few inches of warm water (Not too hot ). These soaks should be done for 10-15 minutes at a time, 3-4 times daily) ,you can take over the counter anti inflammatory medicines like ibuprofen to relieve pain but an Bartholin s abscess often need to be drain out completely by a doctor so I would strongly suggest you to Visit your gynecologist ,she will examine it thoroughly and will make a final diagnosis Depending upon severity she may opt for incision and drainage which is a minor surgical procedure performed under local anesthesia You may also need to take antibiotics for few days I hope it helps Thanks And Get well Soon