I noticed while masturbating that I have a small hard bump under the skin of my penis on the shaft. There is no pain, no color, it is hard to find when not erect and not really viable at all. It is definitely under the skin as I can stretch the skin out & still feel it on the meat of the penis. Googling doesn't provide much & the closest I can find is a cyst or a lymphocele. Any ideas?
If it's concerning you, you should show your doctor. It's probably not concerning, but any new lumps or bumps are always worth getting checked.