My dear friend who has been diagnosed with schizophernia (and also on meds) recently told me that her pain tolerance has increased significantly. She pinched herself and let other people pinch her as hard as possible, and she says the pain she feels is reduced. 

This is physiological and hence a bit confusing. She thinks this could be a symptom of schizophernia (she says she feels numb, sort of dead).

I looked at a couple of studies broadly indicating that some people who have schizophernia describe having symptoms of increase in pain tolerance, but I couldn't find anything convincing or conclusive.

And so I come to you, comrades. Any one of you had such similar symptoms at any point? Could this be somehow related to schizophernia? 

Also, in any case, she'll be seeing a neurologist as this could as well be an unrelated nerve case (her psychatrist suggested this after ruling out the possibility that the meds she are talking caused this--but, he hasn't said anything as to whether schizophernia could be the casue).