26. March 2026
Written by the CK Physio Clinical Team · Last reviewed 14 July 2026 · Hanwell & Ealing, West London
Electrotherapy is a group of gentle, non-invasive physiotherapy treatments that use small electrical currents, sound waves or light energy to help manage pain, support tissue healing and keep muscles working during recovery. It works best as one part of a wider, tailored plan — alongside hands-on therapy and exercise — rather than as a treatment on its own. This guide explains what the evidence genuinely supports, where electrotherapy fits, how many sessions you might need, and how our chartered physiotherapists use it across Hanwell, Ealing and West London.
Electrotherapy in physiotherapy: benefits, evidence and what to expect
Electrotherapy describes a family of physiotherapy techniques that use controlled energy — electrical currents, ultrasound or light — to influence nerves, muscles and soft tissue without drugs or surgery. It's one of the oldest tools in the physiotherapy kit, and a modern, evidence-led clinic uses it thoughtfully rather than by default.
The forms you're most likely to come across at a UK clinic are:
- TENS (transcutaneous electrical nerve stimulation) — gentle currents applied through the skin to help ease pain.
- IFT (interferential therapy) — a medium-frequency current sometimes used for pain and comfort.
- NMES (neuromuscular electrical stimulation) — stimulation that makes a muscle contract, used to help keep muscle working when injury or surgery makes it hard to do so yourself.
- Therapeutic ultrasound and low-level laser therapy (LLLT) — energy-based treatments occasionally used to support soft-tissue healing.
Shockwave therapy is a related energy-based treatment but works differently and suits different problems — we cover it separately on our shockwave therapy page. You can also read more about the basics in our guide to what electrotherapy treatment is and how it works.
What does the evidence actually say?
We think it's important to be straight with you: the research on electrotherapy is genuinely mixed, and it is stronger for some uses than others. Being honest about this is part of how we help you make a good decision.
For pain relief using TENS and interferential therapy, the national picture is cautious. The National Institute for Health and Care Excellence advises against offering TENS or interferential therapy for low back pain and sciatica (NICE NG59), and does not recommend TENS, ultrasound or interferential therapy for chronic primary pain (NICE NG193). The current osteoarthritis guideline (NICE NG226) puts its weight behind exercise and weight management rather than electrotherapy.
That doesn't make electrotherapy useless — many people find TENS helpful for short-term, drug-free relief, and the underlying pain mechanism is well described. It does mean we use it as an optional adjunct, chosen case by case, to help you stay comfortable enough to do the active parts of your recovery — never as a stand-alone fix.
Where the evidence is clearer and more encouraging is in using stimulation to protect muscle during recovery. That's where electrotherapy earns its place in a plan, and it's the benefit worth understanding first.
The benefits patients tend to notice
1. Drug-free help with pain
For people who can't take anti-inflammatories, or who would simply rather not rely on painkillers, TENS offers a non-invasive way to take the edge off pain in the short term. The idea goes back to the classic “gate-control” theory of pain first described by Melzack and Wall in 1965: stimulating the nerves can effectively “close the gate” on pain signals travelling to the brain. Responses vary from person to person, so we'll trial it and see how your body responds rather than promise a fixed result.
2. Keeping muscle working after injury or surgery
This is where electrotherapy is at its most useful. When a joint is painful or has just been operated on, the surrounding muscle can “switch off” and waste quickly — research on leg immobilisation found total thigh-muscle volume dropped by around 5.5% in just seven days, roughly 0.8% a day, with the quadriceps most affected (Kilroe and colleagues, 2020). Neuromuscular electrical stimulation (NMES) helps the muscle keep contracting even when doing so voluntarily is difficult or off-limits.
The evidence here is reassuring. A 2025 systematic review and meta-analysis found that adding NMES to standard physiotherapy significantly improved early quadriceps strength after ACL reconstruction compared with physiotherapy alone. For a keen five-a-side player, a new parent lifting a baby, or someone preparing for a return-to-work assessment, protecting that muscle early can make the whole recovery smoother.
3. Helping you stay active in your recovery
Pain and stiffness make it hard to move, and not moving slows recovery. By helping with comfort and keeping muscle engaged, electrotherapy can help you take part in the graded exercise and hands-on treatment that genuinely drive progress. It's the supporting act, not the star — and that's exactly how it should be used.
4. A gentle, well-tolerated option
For most people, electrotherapy is one of the more comfortable things a physiotherapist can offer. The most common side effect is mild, temporary skin irritation under the electrodes, which settles as soon as they're removed. Because it acts locally rather than throughout the body, it can suit people who are managing several health conditions at once — always after a careful check of your medical history.
Which conditions might electrotherapy help?
Electrotherapy is most likely to add value when a muscle is weak or recovering, when a specific tissue is settling after injury, or when short-term pain relief would help you get moving. A few situations we see regularly in the Hanwell clinic:
- Desk-based neck and back pain: TENS or IFT for short-term comfort, alongside hands-on therapy and posture work.
- After sports injuries: stimulation to support recovery as part of a graded return to activity.
- Recovering from surgery (for example ACL, shoulder or hip): NMES to help maintain muscle, once your surgical team is happy for you to start.
- Staying mobile in later life: NMES to support leg strength and TENS for arthritic aches — often delivered on a home visit.
If your pain is widespread and long-standing without a clear tissue cause, electrotherapy alone is unlikely to be the answer, and a broader approach is the right path. You can explore related guidance on physiotherapy for sciatica, knee arthritis and exercise, and plantar fasciitis, or see the full list of conditions we treat.
How many sessions, and what happens in one?
There's no fixed number — it depends on your condition, your goals and how you respond. Every course of electrotherapy at CK Physio starts with a full assessment, not with electrodes. We talk through where your pain is and what's driving it, check that electrotherapy is suitable for you, and agree a plan together.
During a session, TENS feels like a light, comfortable tingling; NMES produces a gentle, visible muscle contraction. We review your progress every few sessions. If something isn't helping, we change it. And because electrotherapy is always a means to an end, we taper or stop it once you've built enough strength and confidence to keep progressing on your own — discharging you with a home programme to maintain your gains.
Is electrotherapy safe? Who should take extra care
For most people electrotherapy is very safe, but a small group of patients need careful screening or should avoid it. This is exactly why a proper assessment matters. Please tell your physiotherapist before treatment if any of the following apply to you:
- You have a cardiac pacemaker or implanted defibrillator
- You have active cancer in the area to be treated
- You have a known or suspected blood clot (DVT)
- You are pregnant (we avoid the abdomen and pelvis)
- You have broken skin or an active infection in the treatment area
- You have reduced skin sensation (for example with diabetes)
- You have a history of epilepsy
Our physiotherapists are all registered with the Health and Care Professions Council (HCPC) and are members of the Chartered Society of Physiotherapy, with the training needed to screen you properly and use the equipment safely.
How CK Physio uses electrotherapy in West London
We've provided physiotherapy in Hanwell and Ealing since 2003, and we're one of the few clinics in West London offering a dedicated home-visit service. That matters more than it sounds. Recovery depends on showing up for your rehabilitation, and for a new parent, someone recovering from surgery, or an older patient who finds travel difficult, bringing the treatment to your home can be the difference between a plan that works and one that fizzles out.
We never prescribe electrotherapy by protocol. Our chartered physiotherapists use it selectively, woven into a plan that also includes hands-on manual therapy, exercise, and where appropriate acupuncture, massage or shockwave — always guided by your goals, whether that's getting back on the pitch, returning to work, or simply moving through your day in comfort. We're registered providers for BUPA and AXA, so if you have private medical insurance your treatment may be covered. We'll always give you a clear plan and cost estimate at your first assessment, so there are no surprises.
Frequently asked questions
Does electrotherapy hurt?
No — applied correctly, it shouldn't be painful. TENS usually feels like a light, comfortable tingling, and NMES feels like the muscle switching on by itself. Anything sharp or uncomfortable means the intensity is too high and should be turned down straight away. Comfort, not pain, is the sign the settings are right.
Does electrotherapy actually work?
It depends on the problem and the person. The evidence is strongest for NMES to support muscle strength after surgery or immobilisation. For pain relief with TENS or interferential therapy, the research is mixed and NICE does not currently recommend these for low back pain or chronic primary pain. Some people still find them genuinely helpful for short-term relief, which is why we use them selectively as part of a wider plan.
Does NICE recommend TENS?
Not for the conditions people most often ask about. NICE NG59 advises against TENS and interferential therapy for low back pain and sciatica, and NG193 does not recommend TENS, ultrasound or interferential therapy for chronic primary pain. We're open about this: we use electrotherapy as an optional adjunct where a chartered physiotherapist judges it may help, not as a substitute for exercise and hands-on treatment.
Is electrotherapy safe for older people?
For most older adults it's well tolerated and can be a useful, gentle option — particularly NMES to help maintain leg-muscle strength during recovery. Age itself is not a barrier. The main things we screen for are reduced skin sensation (common with diabetes) and any implanted device such as a pacemaker.
How many sessions will I need?
It varies with your condition and goals. We review your progress every few sessions and agree a clear plan with you. Electrotherapy is always a tool with an endpoint — we taper or stop it once you've built enough strength and comfort to progress with active rehabilitation.
Will I become dependent on electrotherapy?
No. There's no biological mechanism of dependence. If the effect seems to lessen over several weeks, that's usually the nervous system getting used to the input, which we manage by adjusting the settings or taking a short break. The aim is always to help you need it less over time, not more.
Can I use a home TENS machine instead of coming in?
Home TENS units can help with everyday flare-ups, and we often suggest one between sessions. What a clinic adds is an accurate diagnosis, the option to combine approaches, and a chartered physiotherapist who can adjust things as you improve. A home unit is a useful supplement to a proper plan, not a replacement for one.
Wondering whether electrotherapy is right for you?
Let's start with an assessment. Our chartered physiotherapists will listen, examine what's going on, and build a plan around your goals — in clinic or at home across Hanwell, Ealing and West London.
Book an assessment Ask us a questionClinically reviewed by
The CK Physio Clinical Team
HCPC-registered physiotherapists and members of the Chartered Society of Physiotherapy, providing physiotherapy across Hanwell, Ealing and West London since 2003. Registered providers for BUPA and AXA. This article is for general information and isn't a substitute for a personal assessment — please speak to a physiotherapist or your GP about your individual circumstances.
References
- National Institute for Health and Care Excellence. Low back pain and sciatica in over 16s: assessment and management (NG59). nice.org.uk/guidance/ng59
- National Institute for Health and Care Excellence. Chronic pain (primary and secondary) in over 16s (NG193). nice.org.uk/guidance/ng193
- National Institute for Health and Care Excellence. Osteoarthritis in over 16s: diagnosis and management (NG226). nice.org.uk/guidance/ng226
- Melzack R, Wall PD. Pain mechanisms: a new theory. Science. 1965. pubmed.ncbi.nlm.nih.gov/5320816
- Sluka KA, Walsh D. Transcutaneous electrical nerve stimulation: basic science mechanisms and clinical effectiveness. The Journal of Pain. 2003. doi.org/10.1054/jpai.2003.434
- Wu L-C, et al. A meta-analysis of transcutaneous electrical nerve stimulation for chronic low back pain. Surgical Technology International. 2016. pubmed.ncbi.nlm.nih.gov/27042787
- Kilroe SP, et al. Temporal muscle-specific disuse atrophy during one week of leg immobilization. Medicine & Science in Sports & Exercise. 2020. doi.org/10.1249/MSS.0000000000002200
- Effects of neuromuscular electrical stimulation on quadriceps strength and knee function after ACL surgery: a systematic review and meta-analysis. 2025. pmc.ncbi.nlm.nih.gov/articles/PMC11729445
- Chartered Society of Physiotherapy — using the CSP brand and title. csp.org.uk/about-csp/using-csp-brand
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