lump on side of penis

I am 16 years old from the UK, I have a lump on the side of penis slightly smaller than the size of a pea, It is benief the skin and does not hurt at all even if i 'fiddle' with or around it. I have not had sex before, It is quite a hard lump and becomes harder when erect, as I have said before it causes absolutely no pain at all. A few months before i got this lumps i had two similar ones, one under each nipple I went to the local doctors and they were identified as cysts,due to apparently teh amount of growing i was doing. Personally after careful research on many forums etc I have come to the conclusion that this 'lump' is a cyst, a sebaceous cyst although i would like a second opinion.
This lump has been here for about 2-3 months now, and is not growing or shrinking in size, the cysts under my nipples shrank after 3-4 months, I would like to know if you agree with md, and if this lump would shrink like my others? Thank you and I hope to be hearing from you.

[marra315]

hi , i do agree with you !  but do see your gp as all lumps should be seen even if its just foe piece of mind . good luck x x