Fear not – the latest research indicates that:

“If people experience the emotion of fear to a significant degree . . . their pain tolerance increases … ” …

… “a fight-or-flight response absorbs mental capacity to the point where a person doesn’t think about the pain.” …

… “pain tolerance also has a lot to do with coping mechanisms — distraction being a key example. ” …

… “If you’re screaming obscenities, you’re not thinking about your pain … “.

Thus, the following naturopathic regimen is lately becoming “all the rage” (pun) in the medical press:

Denying effective analgetics to patients presenting as being in physical agony – whether they know it or not – effectuates a measurable analgesic effect in the subject.

Physician to patient: “I’ve just activated your ‘fight-or-flight’ center in your limbic brain’s amygdala … I’ll bet that you are feeling better already! … that will be $100 … stop at the collections desk on the way out to pay, and you will, as a result, likely be feeling even better still! … Come back and see me anytime you like if you require further theraputic treatments … and, have a *wonderful* day!”
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Maybe, just speculation here, it’s not “cursing” per se but doing something vigorous that one would normally censor, that helps one tolerate the sensations.