There are many possible causes for penile discoloration, but you should skin to appear on the shaft or head of your penis, also called the glans. White patches that form on the penis could be a sign of lichen sclerosus.
Penile papules are rows of tiny white growths around the head, or glans, of your penis. Penile papules are harmless. It's not clear.
gonorrhoea: this can cause an unusual white, yellow or green discharge from the tip of your penis, pain or a burning sensation when peeing, and inflammation.