There is some redness on the head of my penis. It covers from the middle down. The tip of it is fine when I touch it, but when I touch the redness, it feels different. More sensitive and even stickier. When I lift my finger off, it hurts for 2 seconds. The very bottom is also a reddish-purple. I've also noticed that the bottom is more moist than the top when I peel back (yes. I am uncircumsized.) I was wondering if this is just irritation from masturbation of something more serious? Thanks