Realize that there’s skill in not showing the pain. One of the first steps is to always RELAX your face… This is why a lot of people never look like they’re in pain… they’ve just controlled the mind to tell the body… “it’s ok”…
One of the issues is your body kicking in the fight/flight response. When you convince the body… “Hey… we ain’t dying here… it’s ok”… you’ll be surprised how much you can change your relative rpe.