Hi, recently I have found a rather large spot on the shaft of my penis that is rather sore. What could it be?

[book-lover]

I've been researching this for awhile. The spot randomly appeared yesterday and is the second time it has emerged. The first time it emerged it was on a different location of my penis shaft. The last one seemed to pop from the pressure of the water from a shower. I'm getting really worried this could be related to Genital Herpes or Genital Warts.

[CharlieJoe]

It's probably a sebaceous cyst (blocked sweat gland). Id it happens again head to a sexual health clinics and let an expert have a look (and have a checkup too) - It doesn't sound like herpes or a wart.