Tens Machines for Sciatica

Short answer: A TENS machine for sciatica can give temporary, drug-free relief while it is switched on, and many people use one to make walking, sitting and their exercises easier. It does not treat the cause of sciatica, and NICE does not recommend it as a treatment. Use it alongside exercise and medical advice, not instead of them

What is sciatica and why does it hurt so much?

Sciatica is pain caused by something pressing on or rubbing against the sciatic nerve. It is the longest nerve in the body. It starts in your lower back, runs through the buttock and travels down the back of each leg to your feet. The NHS sciatica guide describes a sharp, burning pain down the back of the leg, along with tingling, numbness or weakness. It usually affects the bottom and the back of one leg.

The most common cause is a slipped disc pressing on a nerve. Narrowing of the spinal canal (spinal stenosis), a vertebra slipping out of place (spondylolisthesis) or a back injury can do the same. Because the problem sits in a nerve, the pain feels nothing like an ordinary backache. People describe it as a trapped nerve in the leg, an electric shock, or toothache running from the buttock to the calf.

How common is sciatica in the UK?

The scope document for NICE's back pain and sciatica guideline puts the lifetime chance of sciatica at 13% to 40%, with 1% to 5% of people having an episode in any one year (NICE NG59 scope). The spread is wide because studies define sciatica differently. It is rare before 20 and most common in people in their 40s.

Does a TENS machine help sciatica? The honest evidence

Some people find a TENS machine eases the feeling of sciatica pain while it is running. The research is mixed, though, and it is not a recommended NHS treatment. Here is what the main sources actually say.

What NICE says about TENS for sciatica

NICE guideline NG59 covers low back pain and sciatica in people over 16. Recommendation 1.2.11 is blunt: do not offer TENS for managing low back pain with or without sciatica. You can read it in the NICE NG59 recommendations.

In plain English, NHS clinicians should not hand out TENS as a sciatica treatment. NICE says the same about belts, traction, acupuncture and ultrasound. It does not say TENS is unsafe, and it does not stop you using one yourself for comfort. The NHS's own TENS page describes it as a treatment that gives temporary pain relief, and is upfront that it does not work for everyone.

What the research shows

• The biggest review. The meta-TENS study in BMJ Open (2022) looked at 381 trials covering 24,532 people with many types of pain. Across 91 placebo-controlled trials (4,841 people), it found moderate-certainty evidence that pain is lower during or straight after TENS than with a placebo. Side effects were generally mild. It did not look at sciatica on its own.
• Chronic low back pain. A Cochrane review of four trials (585 people) found conflicting results for pain. Two of the trials (410 people) found TENS did not improve day-to-day function.
• Sciatica from a slipped disc. In a small crossover trial, Ghoname and colleagues (1999) gave 64 adults with disc-related sciatica three treatments in turn. Pain scores fell by 23% with TENS against 8% with a sham treatment, and people needed fewer painkillers. A clinic-only needle treatment called PENS did better again, at 42%.
• Nerve pain in general. A Cochrane review of TENS for neuropathic pain looked at 15 studies (724 people) and rated the evidence as very low quality. The authors could not say with confidence whether TENS works better than sham TENS for nerve pain.

So, is a TENS machine good for sciatica?

It is a sensible thing to try for short-term comfort, as long as you know what it is and what it isn't. The best evidence suggests TENS lowers pain while it is on and for a short while afterwards. That is what most people want from it: a calmer leg so they can walk, work or get through their exercises. There is no good evidence that it speeds up recovery or fixes the disc or nerve problem underneath, which is why NICE does not recommend it as a treatment.

How does a TENS machine work on sciatic nerve pain?

TENS stands for transcutaneous electrical nerve stimulation. A small unit sends mild electrical pulses through sticky pads on the skin, which you feel as a tingle. The NHS says it is thought to work in two ways.

• Blocking pain messages. The tingle travels along "touch" nerves into the spinal cord. That extra traffic can turn down the volume on pain signals before they reach the brain. This is often called the pain gate.
• Endorphins. The stimulation may encourage the body to release endorphins, its own natural painkillers.

Either way, most of the effect is felt while the machine is running and shortly after. That makes TENS a good fit for flare-ups and long days at a desk, and a poor fit for anyone hoping it will do the whole job on its own.

Where to put TENS pads for sciatica

The NHS advice is to place the pads on clean skin near the painful parts of your body. For sciatica, that means following the pain. Start where it is worst, which for many people is the buttock. If the pain travels, add a second pair of pads lower down the leg. Aim to bracket the sore area so the tingle covers it.

Pad placement rules that keep you safe

• Use clean, dry skin with no cream or lotion, and leave a gap between the pads.
• Place pads either side of the spine, not directly on it.
• Never place pads on the front of the neck, over or around the heart, or on broken, sore or infected skin.
• Avoid the crease behind the knee, where pads tend to peel off.
• If you are pregnant, never put pads on the abdomen or pelvis, and speak to your midwife or GP before using TENS at all.

On a wired machine, each channel runs two pads. On a wireless machine, each module sticks straight onto the skin and covers one area, so you need two modules to cover your back and your leg together. Our step-by-step guide on how to use a TENS machine goes into more detail.

Best TENS settings for sciatica

There is no single best setting on a TENS machine for sciatica, and no trial has pinned one down. Physiotherapists usually start with conventional, high-frequency TENS because it is comfortable and works quickly, then try a low-frequency or burst setting if that does not help. The sciatica trial above used a low frequency of 4 Hz. If your machine has preset programmes, pick a TENS (pain relief) programme rather than an EMS (muscle) one.

Turn the dial up slowly until you feel a strong but comfortable tingle. It should never be painful. Your nerves get used to the feeling, so nudging the intensity up a little mid-session is normal. Change one setting at a time so you can tell what makes a difference, and check the programmes listed in your device's manual.

How long and how often should you use a TENS machine for sciatica?

There is no fixed rule. Patient advice from Cambridge University Hospitals suggests using TENS for at least 30 to 60 minutes, building up to a few hours at a time if you find it helpful. The same leaflet says it is safe to use throughout the day, as long as you check the skin under the pads. In the 1999 sciatica trial, people used TENS for 30 minutes three times a week.

A few practical tips:

• Use it when sciatica bothers you most, such as during desk work, before a walk or before your exercises.
• Check the skin under the pads during use and move them if it looks red or sore.
• Do not use TENS while you sleep, in the bath or shower, or while driving or using tools or machinery.
• If you have used it sensibly for a couple of weeks and noticed no difference, stop and talk to your GP or physiotherapist about other options.
  
  

Can a TENS machine make sciatica worse?

TENS is a low-risk way to manage pain when used as directed, but it does not suit everyone. A small number of people find the tingle unpleasant or feel their pain is worse afterwards. If the pain spreads, numbness or weakness gets worse, or the sensation feels wrong, switch it off, take the pads off and speak to your GP.

There is a quieter risk too. Because TENS dulls pain, it can tempt you to push through things your back is not ready for. Use the relief to move gently and keep active, not to lift heavy loads or overdo it in the garden.

TENS machine side effects

The most common problem is skin irritation. The NHS says that if your skin becomes itchy, irritated or red, you should turn the machine off and remove the pads. Fresh, good-quality TENS electrodes, including sensitive-skin versions, can help if your skin reacts.

Who should not use a TENS machine

The NHS says not to use TENS if you have epilepsy or a pacemaker, or if you are pregnant, unless a doctor or midwife has advised it. It also suggests checking with a GP or other healthcare professional first to make sure TENS is safe for you. That is especially worth doing if you:

• have a heart condition
• have any other implanted electrical device
• have pain that has not been diagnosed
• have areas of numb skin, where you cannot feel the stimulation properly
  

Can I use a TENS machine for sciatica while pregnant?

Sciatica-type pain is common in pregnancy, but only use TENS if your midwife or doctor has said it is suitable for you. If they agree, never place pads on your abdomen or pelvis. Med-Fit TENS machines are not designed for use in labour.

Choosing the best TENS machine for sciatica

The best TENS machine for sciatica is one that covers both where the pain starts and where it travels, and that you will actually wear. These are the features worth checking.

• At least two channels. A dual channel TENS machine lets you treat your back or buttock and your leg at the same time. Sciatica rarely stays in one spot.
• Wired or wireless. Wired units use leads and pads, and can take larger back electrodes. Wireless TENS machines stick straight onto the skin with no leads, which many people find easier under clothes and when sitting. Our wired vs wireless TENS comparison explains the trade-offs.
• Enough modules. Wireless machines are counted in modules. Two modules cover back plus leg. Four cover back, buttock, thigh and calf at once.
• Rechargeable. Rechargeable TENS machines save you buying batteries if you use TENS most days.
• Manual settings as well as presets. These let you try the conventional and low-frequency settings in the table above.
• A UKCA or CE mark. The NHS advises checking for one, as it means the device meets the right standards.

Which Med-Fit TENS machine suits sciatica?

TENS or EMS for sciatica?

For sciatica pain relief, use TENS. EMS (electrical muscle stimulation) makes muscles contract, which is not what an irritated nerve needs during a flare-up, and it can feel uncomfortable over a sensitive leg. EMS may have a place later on, for example to support muscle strength if a physiotherapist suggests it. That is where combined TENS and EMS machines earn their keep. Our article on EMS vs TENS explains the difference in more depth.

What else helps sciatica alongside a TENS machine?

The NHS self-help advice for sciatica is simple, and worth following whether or not you use TENS:

• Carry on with your normal activities as much as you can.
• Start gentle exercise as soon as you can, and try the NHS exercises for sciatica.
• Hold heat packs to the painful areas.
• Ask a pharmacist about painkillers. The NHS notes that paracetamol is unlikely to help, and it is not clear how much NSAIDs such as ibuprofen help with sciatica.
• Do not sit or lie down for long periods.

Physiotherapy is one of the main NHS treatments for sciatica. In many parts of England you can refer yourself to NHS physiotherapy without seeing a GP first. A TENS machine fits neatly alongside this, making the exercises that drive recovery a bit easier to stick with. For a wider look at what helps, read our guide to the best therapy options for sciatica relief. If your pain sits mostly in your back rather than your leg, see TENS machines for lower back pain. For other kinds of nerve pain, see TENS machines for neuropathy.

When to see a GP about sciatica, and when to call 999

See a GP if your sciatica has not improved after trying home treatments for a few weeks, is getting worse, or is stopping you doing your normal activities.

TENS machine for sciatica: frequently asked questions

Is a TENS machine good for sciatica?

Many people find a TENS machine gives temporary relief from sciatica pain while it is switched on. Research suggests pain is lower during and just after TENS than with a placebo, but NICE does not recommend it as a treatment. Use it for comfort alongside exercise and medical advice.

Where do you put TENS pads for sciatica?

Put one pair of pads on the lower back either side of the spine, or on the painful buttock. Put the second pair along the back of the thigh or calf, following the line of the pain. Never place pads directly on the spine.

What setting should a TENS machine be on for sciatica?

Most people start with conventional TENS at around 80 to 120 Hz, turned up to a strong but comfortable tingle. If that stops helping, try a low-frequency setting of 2 to 4 Hz or a burst programme.

How long should you use a TENS machine for sciatica?

NHS patient advice suggests at least 30 to 60 minutes, building up to a few hours at a time if it helps, while checking the skin under the pads. Do not use it while asleep, in the bath or shower, or while driving.

Can a TENS machine make sciatica worse?

It is low risk when used as directed, but a small number of people find it makes their pain feel worse. Stop if pain, numbness or weakness gets worse, and see your GP. Skin irritation under the pads is the most common problem.

Does the NHS recommend a TENS machine for sciatica?

No. NICE guideline NG59 tells NHS clinicians not to offer TENS for low back pain with or without sciatica. The NHS does describe TENS as a way to get temporary pain relief, and suggests checking with a GP first that it is safe for you.

Can I use a TENS machine for sciatica while pregnant?

Only if your midwife or doctor says it is suitable for you. If they agree, never place pads on your abdomen or pelvis. Med-Fit TENS machines are not designed for use in labour.

Is EMS or TENS better for sciatica?

TENS is the one to use for sciatica pain relief. EMS makes muscles contract and is aimed at muscle strength, so only use it for sciatica if a physiotherapist has suggested it.