In one 2018 study, for example, researchers studying the mechanics of fibro patients' sensitivity to pain showed that their brains were acting sort of explosively in response to pain stimuli.
Using a group of patients who never feel pain, a study found that their pain matrix still activates in response to stimuli that healthy people find painful.
Today you got your first look at the peripheral nervous system, by learning how the afferent and efferent divisions provide information about, and responses to, pain.
It suggests that traumatic physical or psychological events, likely in combination with a genetic predisposition, may lead to that extreme response to pain and those other symptoms.
And then you've got all these things like massage, and massage has been shown to have huge benefits on a whole range of things like sleep, pain response, immune response.
Seeing as Leatherface does react to pain however, it's likely that he is simply psychologically better able to handle extreme amounts of pain compared to the normal person.
Countless health professionals say this will calm you down, and if you are calmed then the emotional response to pain we discussed earlier might well be lessened.