the spine simulator will act like a tingle when there is pain. it is similar to a TENS unit. I have talked to a churc member who has a spine stimulator who says it has not helpedhim eith his lower back pain. I have stenosis at L3-L4-L5 and am in the process of getting epidural shots in the lower back.hiowever getting these shots you have to have your blood sugars monitored since these will cause gluscose levels to rise......kozlo52