Month ago after masturbating twice a day I found a little lump on the right side of my shaft, under the skin. It’s 1-1,5 cm down from the glans. It felt bit like there was a rice grain under the skin and it moves around on a small area when I “push” it. When I get erection and especially when I masturbate it always gets bigger and more easier to feel under the skin, it becomes almost like half the pea in size. But after masturbating, it usually goes back down to smaller size and sometimes it’s hard to find when I’m flaccid. There’s no pain on it and it doesn’t affect my erection, but it doesn’t seem to go away.
Anybody know what this could be?