Swear for pain. You’re activating the ‘fight or flight’ response which leads to a surge of adrenaline and an analgesic effect. A test showed that people who swear are able to hold their hands in ice-water twice as long as people who don’t.[9]
Use your A List for pain swears.
"Ouch" is nice. But something a bit stronger, harsher has a better chance releasing emotion and easing the pain.