have had back problems, had MRI and it says." Multilevel cervical spondylosis without high grade spinal canal stenosis. I have a Schmorls node at end of lower endplate of C5. all that was offered was exercise to strengthen core. I got back brace and pain laying down is great so take 2 650 gr. arthirtis pills at night. want to try a tens unit. I also have myastavis gravis, and recently found my chloride and B -12 is high, wls 18 yrs ago so cant do nystads. would the tens unit help.