“…2), or loss-of-function mutations in the neurotrophic tyrosine kinase receptor TrkA and nerve growth factor (hereditary sensory and autonomic neuropathy type IV) typically result in self mutilation, bone fractures, multiple scars, joint deformities, amputations, and early death, underscoring the important protective role of nociceptive pain (3). The importance of preserving nociceptive pain is also revealed when peripheral neuropathy leads to a sensory denervation of joints, resulting in Charcot neuro-osteoarthropathy, with severe deformities due to joints damaged because of a lack of pain sensitivity (4,5). Nociceptive pain is, therefore, a pain essential for maintaining bodily integrity.…”