Blaming Rewiring of the Brain for Chronic Pain is Too Simplistic

What a cop out, medical "professionals" are now saying chronic pain is caused by a mixed-up brain. This cannot be the case when you have an open wound and it really hurts. They are saying we should not feel any pain at all. People with leprosy feel no pain and look what damage they do to themselves.

Pain is functional. It stops one using a limb when there is damage to it. Otherwise, it wouldn't heal properly. Most back pain is caused by damage to the spine that cannot be detected with current technology and knowledge.

Those "in the know" are now saying the brain rewires itself when there is an injury so that when the damage is repaired pain still continues. If this is the case then it is very selective. Why doesn't this happen when you cut your finger? We know if a limb is lost pain can continue, but saying the brain rewires itself after an injury is far too simplistic.
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