I was in the shower today when I noticed a red bump about 1 cm wide on the shaft of my penis. I have popped it twice, and the first time there was puss in it. The second time the bump filled with blood and got really red. It doesn't hurt when I pop it. I've tryed to put acne cream on it for 30 minutes but it didn't help.it doesn't itch and it has no side effects, I have recently been masturbating 1 time per day. Please help me!!