Elisabeth Rosenthal | KFF Health News (TNS) Over the past two years, a simple but baffling request has preceded most of my encounters with medical professionals: “Rate your pain on a scale of zero to 10.” I trained as a physician and have asked patients the very same question thousands of times, so I think hard about how to quantify the sum of the sore hips, the prickly thighs, and the numbing, itchy pain near my left shoulder blade. I pause and then, mostly arbitrarily, choose a number.

“Three or four?” I venture, knowing the real answer is long, complicated, and not measurable in this one-dimensional way. Pain is a squirrely thing. It’s sometimes burning, sometimes drilling, sometimes a deep-in-the-muscles clenching ache.

Mine can depend on my mood or how much attention I afford it and can recede nearly entirely if I’m engrossed in a film or a task. Pain can also be disabling enough to cancel vacations, or so overwhelming that it leads people to opioid addiction. Even 10+ pain can be bearable when it’s endured for good reason, like giving birth to a child.

But what’s the purpose of the pains I have now, the lingering effects of a head injury? The concept of reducing these shades of pain to a single number dates to the 1970s. But the zero-to-10 scale is ubiquitous today because of what was called a “pain revolution” in the ’90s, when intense new attention to addressing pain — primarily with opioids — was framed as progress. Doctors today have a full.