S.H.
Look into something called "Tens Unit."
It is not implanted.
I had and have this.
When I had my c-sections. For pain and healing. It is a regular routine thing that my Doc gives, to his patients.
The nurses told me, that all of his patients, heal faster.... than those without it.
It is a portable unit.
It is electrical impulses.
Google search it.
Alternative medicine Doc's, use it as well.
What you may have, is a pinched nerve???
Have you seen a specialist? To formally diagnose, your pain and cause of it?
Have you tried Turmeric, supplements?
It is known to even help Arthritis chronic pain.
http://www.time.com/time/health/article/0,8599,###-###-##...