I have a painful lump in my mons pubis underneath a blue-ish bruise. I just noticed this today and am fairly certain it was not there yesterday. This happened one before about 3 months ago (although also on the vulva, in a different location). The bump is visible and painful to the touch.
Thanks for your question on Chat Doctor. I can understand your concern. Painful lump in vagina or labia is mostly due to abscess or infected cyst. Most common cause for this is infection through sexual intercourse. So if you are sexually active, avoid unprotected intercourse. Other causes are poor genital hygiene, diabetes, poor immunity etc. So Chat Doctor.  Avoid moisture and perspiration in private parts. Keep proper hygiene of private part. Get done sugar levels to rule out diabetes. Start multivitamin tablets. At present, you will need antibiotic cream for local application and oral tablets of painkiller and anti-inflammatory