i had that when i first began to masturbate. All i did was stretch the foreskin over the head until it began to hurt.i kept doing this until my foreskin went right over the head. (try it in a bath of warm water) hopefully that should fix it....?
^^^ yup! I remember thinkin "Oh sh*t I dont want a Dr. looking at my penis!" lol but it was A-OK in the end