You've heard of varicose veins — those swollen veins that sometimes show up in the legs.
But you might never have heard of a varicocele, which is also a swelling of the veins. A varicocele happens just to guys. That's because it's not in the legs but in a place a bit more private and a lot more tender — the scrotum. It's generally harmless and basically the same kind of thing as varicose veins in the legs.