My first post on this forum (last summer? on "health issues") was about a lump like that... speaking of TMI. "Hi y'all, my name is lph and I have a vaginal problem"

It hurt like <insert favourite invective here>, and took several weeks to disappear. I had a raised, flat hard lump on either side and had trouble sitting.

I tried not riding for a few days, not sitting , washing often, shaving, not shaving, cooling balm, no underwear under biking shorts and wearing boxer shorts otherwise (cotton - no synthetics). I have no idea what exactly made them go away. But they did recede and disappear in the end.