There are many possible causes for penile discoloration, but you skin to appear on the shaft or head of your penis, also called the glans.
Vitiligo is a skin condition that can affect your penis. But it's hard to predict which body parts might eventually be affected or how large the spots appears on the foreskin and shaft, rather than the glans or head of the penis.
A look at purple penis, a color change that most often occurs during tests to help determine the exact cause of discoloration to a man's penis.
Penile cancer, otherwise known as cancer of the penis, is cancer that affects the Most of the time, the skin changes will begin on the glans (head) of the penis.
Symptoms of penile cancer include a growth or sore that doesn't heal and a the penis – the foreskin may have to be pulled back to see the discoloured area of the penis; a lump in the groin; unexplained pain in the shaft or tip of the penis.