What are the major issues surrounding pain?

Disability: Pain is an objective complaint that is often poorly understood by others and is frequently poorly explained by the sufferer. Its cause may not be obvious in a lot of cases, creating fear, medical attention, extensive and expensive work up and sometimes treatment. Economic and emotional repercussions are substantial.

Wow..tough question: The mechanisms of pain are too plentiful to even discuss. There are also so many types of pain, and effects of pain- emotional, mental, physical. If you are talking about pain in general, maybe it is fibromyalgia. Hard to say. Need to see a doctor and go from there.