Just goes to show, eventually someone will write everything on the internet!!!
Anyway, since I've been doing reasonable cycling mileage (about four years now, 8,000-12,000 miles per year) I have periodically been troubled with little cysts in my ladies undercarriage. The first couple of times I went to the doc and they gave me antibiotics which cleared it up (after having to show them the problem which is rather undignified). I seem to get them about once every six months or so. A few times I've just left them, been excessively careful in treating the area gently when using loo roll and of course regularly showering, and they have gone away. Last one was a year ago, just before my Berlin to London trip, and I got antibiotics for that as I didn't fancy cycling along with what feels like a pea in amongst my undercarriage.
Anyway, I noticed yesterday that I have another one again. Not particularly painful but annoyingly there. I suspect this time I'll just be very gentle and leave it to fade on its own but I'm interested if anyone else gets 'em and knows why they keep coming back. Is it to do with sweating when doing lots of rides and maybe not showering quickly enough? Non-cotton underwear (use cyclists lycra stuff). I don't wear padded shorts as I am a recumbent rider, just normal non-cotton knickers and a pair of longs over the top.