Lately when I’ve been Jelqing the vein that runs through my foreskin gets very full of blood. As I move my hand up I feel a lot of pressure towards the glans but I can’t tell if it’s the head filling up with blood or just the vein. I don’t want to overdo it and burst that vein but if I loosen the grip then I feel no expansion at all. I’ve tried retracting the foreskin but then I can’t Jelq properly. Anyone else ever have a similar problem or sensation?