i am 21 and i have not had sex with a girl in the last year
last sunday i masturbate arround 4 times and now i have a lump on my penis
Its on the left shaft, its not on the skin, i think its on the internal (tunica albugina?) because when i move the skin the lump continue there
i have no pain when my penis is not erected but i have pain when its erected.
Colour its normal and i have a good hygiene.
What can i do?