I always tend to have the same response when asked what is your pain level today: "Compared to what?"
I have also learned, especially for those that deal with chronic pain and learn to mostly deal with it or to push it back in their brain, to not undersell your pain when asked. Most who deal with chronic pain learn to push it back some and it becomes a fabric of daily life, so when asked to rate it, it is often underrated. It took me some time, but I learned to not be "tough" and say my pain was a 3 when really it was probably something closer to a 6+. It is a hard scale, but I am sure it is difficult for many providers too.