Dermatology Questions? Ask an Online Dermatologist.
This is Dr. David
thanks for the photo
when your penis is erect and engorged, it can be very common to have these veins swell up and be pronounced and have a blue purple color
the color is from venous blood right below the skin.
the penis keeps in lots of venous blood to keep the penis enlarged and engorged.
99% of the time, this is completely normal
it is very rare to have blood clots or vascular inflammation cause welling of the veins.
blood clots in the veins of the penis are super super rare at your age.
vein infections or inflammation is very rare at your age as well and often will cause pain in the area.
it doesn't sound like you are having pain in the area.