Dont let your dreams be dreams

Nociceptor: pain senseing neuron
https://en.wikipedia.org/wiki/Nociceptor#cite_note-7
See "location".
Interestingly acording to a couple of Quora posts and some NHS documentation the brain, parts of the spine and high stress tissue are exempt from haveing these and insted send signals of pain by diffrence in expected blood presure in these organs.