After a while, I noticed that there was a lump on my penis at the bottom of the shaft, it was near the testicales so I'm quite worried right now. When i'm erect it does go bigger and more hard. The lump is also paler than the rest of the skin around the shaft so i'm worried about that too could someone please inform me what this is and if it is harmful, thank you! By the way, i like to keep my information secret so it might help if is say i'm between the age 13-17yrs old