Help excruciating burning mid back pain? Dr has tried hydrocodone, flexeril (cyclobenzaprine hcl) tramodol. None help. I'm using a tens unit and med, pain is still at 8

More info needed. What has your doctor diagnosed as the cause of your pain? Your description is very brief so providing you with possibilities regarding the cause and treatment options is difficult; however, the term "burning" suggests a neuralgia (nerve pain). Neuralgias respond poorly to narcotics but often to anti seizure drugs... Have you ever had shingles? If yes, post herpatic neuralgia may be the cause...
See details. Has the pain been properly evaluated including an MRI of the back area and even a ct scan of the chest? If not, that needs to be done asap.