I wholeheartedly agree with MrsM. The focus of his office isn't pain, but rather gaining control over one's pain. I help people with hypnosis for pain managment. I have them focus on a visual image of the pain leaving their body. A quilt/wall hanging that uses some image he might suggest could be a wonderful help. Some people have a hard time viaulizing. A wall hanging could be used as their focal point. Does he know that you are doing this for him? If so, maybe ask him if he uses visual imagery and what would serve his patients best.
What a wonderful thing to do for him and his suffering patients. Big thumbs up