Yeah I am cut but I learned that if your foreskin hurts to be pulled back it isn't loose enough; ergo (fancy word for "therefore") you should pull it back from your penis head regularly to loosen it up (why not masturbate this way; kill two birds with one stone!).
If it doesn't loosen up your foreskin is attached to your shaft in a place where it shouldn't be attached. If that's the case you'll need a doctor to cut it (not circumcise, just cut the attached part). Don't worry it's a really simple procedure (I know someone who got it; didn't bother him at all).
So yeah hope this helps!