Question 1

What is spinal cord stimulation, in one paragraph?

Accepted Answer

A small device delivers mild electrical energy to the spinal cord through thin wires placed in the epidural space — the same space used for an epidural injection. The energy changes how pain signals are processed before they reach the brain. Nothing is cut, removed or destroyed, and the whole system can be turned off or taken out.

Question 2

Is this a last resort?

Accepted Answer

It is usually considered after conservative care, injections and, where relevant, surgery have been tried. But 'last resort' is misleading. Outcomes tend to be better when the therapy is considered earlier in the course of chronic pain rather than after a decade of escalating treatment, so waiting is not automatically the safer choice.

Question 3

Will it cure my pain?

Accepted Answer

No. The goal is meaningful reduction in pain and improvement in function, not elimination. The conventional benchmark in studies is at least 50% relief, though many patients value the functional changes — sleeping through the night, standing long enough to cook — more than the number.

Question 4

Is it the same thing as a TENS unit?

Accepted Answer

No. A TENS unit sits on the skin and stimulates surface nerves. A spinal cord stimulator delivers energy directly to the spinal cord from inside the spinal canal. They are not comparable in reach, precision or effect, and doing poorly with TENS does not predict doing poorly with SCS.

Question 5

Will I feel tingling all the time?

Accepted Answer

Most modern waveforms are designed to be sub-perception, meaning you feel nothing at all from the device. Traditional tonic stimulation does produce a tingling sensation called paresthesia, and some patients prefer it. This is a choice, not a requirement.

Question 6

What kinds of pain respond best?

Accepted Answer

Historically, neuropathic pain — burning, electric, shooting — responds best, particularly pain radiating into a limb. Newer indications have expanded this to axial back pain in people who have never had surgery, and to painful diabetic neuropathy. Pain that is purely mechanical, like an arthritic joint, is generally not the target.

Question 7

I've already had spine surgery. Does that disqualify me?

Accepted Answer

Not at all — it is one of the most common reasons people are referred. Chronic pain continuing after spine surgery, now usually called persistent spinal pain syndrome, is the population in which spinal cord stimulation was first established.

Question 8

I've never had surgery. Can I still be considered?

Accepted Answer

Yes. Several systems now hold specific FDA indications for non-surgical refractory back pain, meaning back pain in people who are not surgical candidates and never will be. This was not true a decade ago.

Question 9

Why do I need a psychological evaluation?

Accepted Answer

Because untreated depression, an unmanaged sleep disorder or unrealistic expectations reliably blunt the result of any pain therapy. The evaluation exists to identify treatable things that would otherwise undermine your outcome — not to screen you out or to imply the pain is in your head. It is also required by nearly every insurer.

Question 10

What would rule me out?

Accepted Answer

Absolute barriers are few: active untreated infection, an uncorrected bleeding disorder, or an anatomical problem preventing safe lead placement. More common are relative factors that should be addressed first — active smoking, poorly controlled diabetes, untreated depression, or an ongoing need for very high-dose opioids.

Question 11

What actually happens during the trial?

Accepted Answer

Temporary leads are placed through a needle in an outpatient procedure, with no incision. They exit through the skin and connect to a small external generator you wear. You go home and live as normally as restrictions allow for about a week, then your treating clinician removes the leads.

Question 12

Does removing the trial leads hurt?

Accepted Answer

It is one of the more anticlimactic moments in medicine. The leads are withdrawn with steady traction, it takes seconds, and no anaesthesia is needed.

Question 13

How is a successful trial judged?

Accepted Answer

The traditional threshold is 50% or more pain relief. In practice the more useful question is what you were able to do that you could not do before. Sleep, standing tolerance, walking distance and medication use often tell you more than the score does.

Question 14

What if the trial doesn't work?

Accepted Answer

Then it did exactly what it was supposed to do. You avoided a permanent implant that would not have helped, at the cost of one week. That is a good outcome, not a failure — and it may point toward a different target, as a failed SCS trial sometimes leads to a successful DRG trial.

Question 15

Can I shower during the trial?

Accepted Answer

No. The dressing must stay dry and intact, so sponge bathing only. It is one week, and keeping the site clean and dry is the single most important thing you can do.

Question 16

Can I have an MRI?

Accepted Answer

Usually yes, but the details matter enormously. Every system is MRI conditional, meaning safe under specific conditions — field strength, which body part, coil type and device settings. Some systems allow full-body scanning at both 1.5T and 3T; others are more restricted. If MRI is likely in your future, raise it before choosing a platform.

Question 17

Will it set off airport security?

Accepted Answer

It may. You will be given a device identification card to show security staff. Ask for a hand search rather than walking through the archway if you prefer, and tell them you have an implanted medical device.

Question 18

Do I have to charge it?

Accepted Answer

It depends on the system. Some generators are rechargeable, with charging frequency ranging from a few times a year to weekly depending on the platform and your settings. Others are recharge-free and are replaced surgically after several years. Neither is universally better — it is a genuine trade-off.

Question 19

How long does the device last?

Accepted Answer

Leads can last many years. Rechargeable generators are typically rated for around a decade; recharge-free generators are replaced sooner. Generator replacement is a much smaller procedure than the original implant, since the leads stay where they are.

Question 20

Can it be removed?

Accepted Answer

Yes. The entire system can be explanted. That reversibility is one of the genuine advantages of neuromodulation over ablative or destructive procedures.

Question 21

What are the most common problems?

Accepted Answer

Lead migration — the lead shifting from its programmed position and changing your coverage — is the most common. Infection is uncommon but serious when it occurs. Loss of effectiveness over time happens to some patients and can sometimes be recovered with reprogramming. These should be discussed openly before you decide.

Question 22

Which company makes the best device?

Accepted Answer

There is no honest answer to that question, because the head-to-head trials that would answer it do not exist. Each manufacturer compares its therapy to older conventional stimulation, not to its competitors. The right question is which system fits your pain pattern, your MRI needs and your willingness to recharge.

Question 23

Who chooses the device — me or my physician?

Accepted Answer

Both. The clinical reasoning about which therapy and which target comes first, and it narrows the field considerably. Within the remaining options, your preferences about recharging, MRI access, external wearables and device size genuinely matter, and you should be part of that conversation.

Question 24

What does closed-loop actually mean?

Accepted Answer

Most stimulators deliver exactly what they were programmed to deliver, regardless of what reaches your spinal cord. A closed-loop system measures the spinal cord's response to each pulse and adjusts the next one to keep activation on target — correcting automatically for the changes caused by moving, breathing and changing position.

Question 25

Is a newer system automatically better?

Accepted Answer

No. Newer usually means more measurement, more programming options and better MRI labeling. It also means less long-term data. A well-established platform with a decade of follow-up is a perfectly reasonable choice.

Question 26

Will insurance cover this?

Accepted Answer

Spinal cord stimulation is widely covered by Medicare and commercial insurers when documentation supports it. Coverage generally requires evidence of failed conservative care, an appropriate diagnosis, a psychological evaluation, and a successful trial before the permanent implant is authorised. Your treating clinician's team typically submits the documentation and requests authorisation from your insurer.

Question 27

How long does authorisation take?

Accepted Answer

It varies by insurer, commonly a few weeks. The trial and the permanent implant are usually authorised separately, so there is a second wait between them.

Question 28

How do I arrange an evaluation?

Accepted Answer

Ask your current clinician for a recommendation, or contact a qualified neuromodulation specialist's office directly to ask about referrals, scheduling and insurance requirements. This educational site does not schedule evaluations or arrange referrals.

Question 29

I live out of state. Is that a problem?

Accepted Answer

It is manageable but requires planning, because the trial week and the implant are separate visits and follow-up matters. There is a travel and planning page on this site that covers what to think about.

Questions patients actually ask

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