I've got a marble sized lump right where my leg crease is, on the tendon-y bit, where knickers would sit. It's quite hard and movable. I had one in the same place months back but I squeezed it and it went down, there's nothing to squeeze on this, no head etc.
What on earth is it? It's not really painful, just gets a bit sore if something rubs against it. Do I need to see a GP? I'd say it's been there for about a month with no change.
Any advice on how to treat it?