About a week ago I started seeing a mass under the skin of my penis, it's located just under the head on the shaft it's on the top side of my penis (looking down, penis straight out), it a oval shape not very big with a cord like thing. It's there erect or not. It doesn't hurt or cause any discomfert what so ever, it does not appear to be getting any bigger, it moves around kinda freely, it almost looks like a snake with the head being the lump and the cord being the body. When I push on it, it will go away for a couple of days and come back, it can be poked and messed with and not hurt what so ever. I not sexually active, expect for masterbation.