Small,stinky hard lump on inner thigh next to scrotum

I have a hard, pea sized lump on my right inner thigh next to my scrotum. It is usually painless unless I ride the bike, but it produces a strong urine/ammonia stink. It has no pushead and cannot be popped. Any answers you can provide will be greatly appreciated.

Small,stinky hard lump on inner thigh next to scrotum