Hey,
this may be completely unrelated but I have no one else in my life I can ask who would understand. Whenever I'm overstimulated or on the way towards a big meltdown my long term injuries seem to bother me more. Why is the only time my injuries really bother me is when I'm struggling? When I'm busy masking my pain doesn't bother me anywhere near as much.
Limited knowledge man here so here a little google
Endorphins are the body's natural painkillers. Endorphins are released by the hypothalamus and pituitary gland in response to pain or stress, this group of peptide hormones both relieves pain and creates a general feeling of well-being.