Assuming you have no other symptoms and the only time you have pain is when you touch the exposed part of your penis, I'd suggest that is most likely just its natural sensitivity. If you do have other symptoms or are concerned pop along to the doctors.
To be clear you want to be able to pull back the foreskin over the head (mushroom/bulb) of the penis. It does not retract further.
You do want to be able to retract your foreskin to clean underneath.
A lot of young guys wrongly assume they have too tight a foreskin, having never retracted it in the past and from the intense feeling of the exposed penis. You can practice retracting your foreskin in the shower or the bath. Don't force it just try stretching it a little each day.
If that's not working then I'd pop along to the doctors, who will likely proscribe you some steroid cream and stretches to do. If after this treatment there is no change, one of the options will be surgery the other is to wait and see. It will be your decision.
Some guys with a tight foreskin develop more significant symptoms like a bad smell, itching, infection or pain or difficulty when peeing or getting an erection - these do require some sort of intervention.