Physical and psychological pain are not cleanly separable categories

Evidence

How clear is the distinction between physical pain and psychological (or social) suffering? All feelings of pain involve physical changes that are not only internal to the body (muscular, biochemical) but also externally visible (voice, demeanor, gait) and culturally readable. This fact alone complicates the too-neat distinction between physical pain and mental pain. — Talal Asad, Formations of the Secular, 404

Categorization

• XREF: connects to: Sensation and action cannot be cleanly separated in bodily experience