I've had a patch or bump on the head (or glands) of my penis. it doesn't itch or hurt and it varies in size day to day, and is pinkish/whitish.

Pearly papules?: There is a benign condition called "penile pearly papules" that raises concern among most men, but represents no disease. It fits your description: can be single or multiple, and looks like a flat wart. Unless you see a steady growth, or other abnormal features (such as bleeding" it usually represents no harm. I suggest you compare the lesion with online images and ask again if evidently differen