Those shots never gave me more than five or six days of relief when I was getting them. If a TENS unit works for you then the spinal stimulator will probably work for you. That's how they test you to see if you're a good candidate for the stimulator. Right now they're probably just giving it to anybody who asks about it because they don't want to give them any kind of opioids for pain relief. I failed on the TENS unit test so they didn't give me a spine stimulator. Instead they gave me the pump which is inserted in my belly and has a catheter running up my spine leaking tiny amounts of Dilaudid directly to the nerve endings. And it works. Not this morning however. I spent two hours last night planting two apple trees my wife was given and it's the hardest I've worked in 4 years since I had cancer and every inch of my body hurts this morning. I should mention I am partially disabled and use a cane or a walker so 2 hours on my feet with a shovel in my hands was a bit extreme. But what baby wants, baby gets.ok