On the Facebook group, Exploring Pain: Research and Meaning, Phil Greenfield writes: “Pain is a subjective experience, with (in the absence of actual tissue damage) pretty much zero in the way of objectively measurable correlative features, so if we’re aiming to help someone who’s in pain, our focus should rest entirely on helping them with regard to their experience, not with regard to pain.
Am I missing something?”
My response was: The experience of pain is important for the person with pain, but meaningless to other people unless there are observable behaviours. The experience of pain is neither reducible to, nor totally separable from, its associated behaviours.
Suppose we encountered a society of people who used a word that lacked any connection with pain-related behaviour, and the complex situations in which we show it. Would we translate this word as “pain”? It is the meaning assigned to the complex pattern of behavioural responses, nonverbal and verbal, and its circumstances, that motivates attempts to help the person with pain.
Simon van Rysewyk 
Simon, Phil seems to have missed the obvious point that “pain” IS the experience.
Yes, I think so!