When pain continues, there are changes that occur to our pain messaging system.
refer to your pain identifcation document
If you relate our bodies to a computer, the bones, muscles, organs and tissues are the hard drive. The hard drive is easy to visualize, with tests, x-rays, and examinations. The soft ware is our pain messaging system and there are no tests or methods to see the soft ware.
When pain continues in our body, there are changes that happen to our pain messaging system and these changes make chronic pain a disease and no longer a symptom.