ever since i could remember i have never been able to touch my penis as it is painful when i do so i am 17 now, i have foreskin and cannot retract the skin all the way, the tip of my penis is always red and swollen but not usually painful sometimes it burns every now and then and an extremely unpleasant smell has always been present, it's so embarrassing and i am way to embarssed to tell anyone about it please help!!
It's VERY NORMAL for your glans to be very sensitive. It's been covered by your foreskin and is not used to being touched. You will get used to it in time.
Start stretching your foreskin NOW. Get an erection and pull down on the shaft skin so the glans spreads the opening OR use your fingers. Do it as often as you can. It may help to do it in the shower. The more often you do it the sooner you'll see results. Ideally, your foreskin should easily slide up and down.
Most likely you have some smegma buildup under your foreskin. You NEED to keep your penis clean and get rid of any buildup.