via Body in Mind
I agree with Lorimer 100% I think one of the problems with presenting chronic pain as a disease is that it opens up the patient to a whole host of other problems, with a chief one being increased central nervous system sensitivity. The National Pain Strategy has taken this up as their cause. However, we know from pain research that chronic pain is the result of the perceived threat, but not the threat or the disease itself.
A diagnosis of "chronic pain" would be like the "diagnosis" of fibromyalgia. People who have this often search for answers, and feel relieved at finally getting one. The answer is more of a label, and not a true diagnosis, which implies cause, rather than just naming your symptoms.