Wow you guys give awful advice.
Skin stretches, just remember, when you masterbate to put pressure on your foreskin on downward thrusts, over time it will loosen up. 3 months ago my foreskin was so tight around my shaft I was like cutting off the blood to my dickhead. But yea, start actually pulling it back while masterbating, when you feel a slight burn (when you know your skin cells are tearing, **and don't worry, the skin heals itself by making more cells**, start pulling back up) plain and simple.