A harmless skin condition, penile melanosis, causes small patches of darkened skin to appear on the shaft or head of your penis, also called.
Vitiligo is a skin condition that can affect your penis. The main symptoms of vitiligo are patches of depigmented skin. Vitiligo of the penis usually appears on the foreskin and shaft, rather than the glans or head of the penis.
This can happen on the head (glans) of the penis or on the foreskin (in uncircumcised men). It can also occur on the shaft. Other health conditions can cause the.