I was probably doing a little *too* much with my girth exercizes and now have a knot on the side of my shaft. I'm almost positive its a thrombosed vein from what I've read. It's not that big, about 1/8" and it's a little hard. Doesn't hurt at all and it's kind of hard to see. Nonetheless(is that a word?) I'm going to play it safe and see if it goes away.