Towards the bottom of the shaft of my penis, a rather odd bump randomly appeared. I believe it formed rather fast as I dont remember noticing it growing at all, it just sort of popped up overnight. This bump seems to steadily grow in size. It's gotten surprisingly large over the course of 2 days. It's white at the top, but it doesnt resemble a pimple in shape, and the white area is rather large. It hurts a bit to apply any kind of pressure to it. Does anyone have any ideas? It's just sort of alarming to me how fast this has appeared.