Hello, glad to have found this..I started having mild pain & numbness in my little finger & a feeling of having my crazy bone constantly hit on the left side, about 6 months ago. I had just completed 2 weeks of daily therapy for lymphedema in my left arm. Last spring, 10 years after breast cancer treatment, I developed lymphedema - a swelling, usually in arms or legs, due to compromised lymph nodes. I had 11 nodes removed from under my arm - leaving my left arm vulnerable. I saw my pcp, an orthopedic surgeon & a neurologist, had an ekg ( nerve conduction test ) & found that there was nothing structurally wrong. They all felt that the swelling was causing it & that eliminating the swelling would eliminate the pain. So I went for more therapy - 2x/week, 6 weeks. During this time my pain worsened & I started having pain in my upper left back & my thumb became numb & my wrist became very swollen. The pain jumped around - sometimes in the shoulder/ back, sometimes in the arm, sometimes in the hand. By late January it was pretty much merged & often extremely painful. I was prescribed gabapentin for the pain - currently take 400 mg/ day. I stumbled upon the work of Dr sarno, found it fit much of my problem, read "the divided mind", decided to give this a try. I believe some of my pain, the lymphedema, is structural, but that the bigger degree of pain may be tms.