Reviewed by the CK Physio Clinical Team, Chartered Physiotherapists · Hanwell & Ealing, West London
That distinction matters. The most reliable benefit of electrotherapy is comfort — a window of reduced pain that lets you move, stretch and rebuild strength. Used this way, alongside a tailored physiotherapy plan, it can be a genuinely helpful part of your recovery. Used alone, in the hope of “curing” a joint or muscle problem, it tends to disappoint.
Electrotherapy can give short-term relief from muscle and joint pain by passing a gentle electrical current through pads on the skin, calming pain signals and easing tension. It works best not as a stand-alone fix, but as a way to reduce pain enough for you to do the exercise and movement that drive lasting recovery — guided by a Chartered Physiotherapist.
At CK Physio, we use electrotherapy selectively — when your assessment suggests it will help you move and progress — never as a one-size-fits-all answer. This guide explains what the evidence actually says, which conditions it suits, and when a different approach makes more sense.
Electrotherapy uses small electrode pads placed on the skin to deliver a mild electrical current to the nerves and muscles beneath. For muscle pain, that current can ease tightness, encourage blood flow and prompt the body to release its own natural painkillers (endorphins). For joint pain, it works mainly by dampening the pain signals travelling from the joint to the brain, making movement feel more comfortable.
The most common form is TENS (Transcutaneous Electrical Nerve Stimulation), which targets pain signals. Others include EMS/NMES (which stimulate muscle contraction to support strength and rehabilitation) and interferential therapy. A Chartered Physiotherapist chooses the type, settings and pad placement based on your specific problem — getting these right is what separates a useful treatment from a frustrating one. You can read more in our companion guide on what electrotherapy is and how it works.
Crucially, electrotherapy is a pain-management tool, not a healing treatment in itself. It does not repair tissue, rebuild cartilage or correct the underlying cause of your pain. That is the job of assessment, targeted exercise and hands-on therapy — which is why electrotherapy sits within a physiotherapy plan at CK Physio, not in place of one.
For knee pain — particularly knee osteoarthritis — electrotherapy has the strongest supporting evidence of any joint, although the effect is modest and short-term. A 2022 systematic review and meta-analysis in Clinical Rehabilitation found that TENS can meaningfully reduce pain, improve function and help walking ability in people with knee osteoarthritis, while noting it does little for joint stiffness.
What this means for you: electrotherapy can take the edge off knee pain enough to let you do the quadriceps and surrounding-muscle strengthening that genuinely protects an arthritic or injured knee over time. It is a facilitator of active treatment — not a substitute for it.
It is worth being straight about the official position too. The UK’s National Institute for Health and Care Excellence (NICE) does not currently recommend electrotherapy as a routine treatment for osteoarthritis, citing inconsistent, mostly small studies. We agree it should never be sold as a cure — but for the right knee, used to enable exercise, many of our patients find it a useful part of getting moving again. That judgement is exactly what a Chartered Physiotherapist is for. If a knee problem is holding you back, our team also shares practical advice on knee arthritis and exercise and how to avoid knee pain.
Beyond the knee, electrotherapy is most useful for localised muscle pain, tension and post-exercise soreness, where its ability to relax tissue and ease discomfort is well suited:
For these, the goal is the same: comfort that unlocks movement. CK Physio combines electrotherapy with sports massage, manual therapy and a graded exercise plan, so each element supports the others rather than working in isolation. If you are recovering from a sports injury or a strain, that combined approach — not any single device — is what gets you back to activity safely.
At CK Physio, electrotherapy is one tool inside a holistic, personalised plan — never the whole plan. A typical pathway looks like this:
| Stage | What it does | Role of electrotherapy |
|---|---|---|
| Assessment | Find the cause of your pain | Decide if it will help |
| Pain relief | Calm symptoms enough to move | Short-term comfort window |
| Active recovery | Exercise + manual therapy | Supports, never replaces |
| Prevention | Build lasting strength | Phased out as you progress |
This is why the same TENS machine that helps one person does nothing for another: it is the clinical reasoning around it that delivers results. Booking an assessment with a Chartered Physiotherapist means electrotherapy — if it is used at all — is targeted at the right problem, with the right settings, as part of a plan designed to get you better and keep you there. You can also weigh up the advantages and risks of electrotherapy or explore our full electrotherapy service.
Being honest about limits is part of good care. Electrotherapy is not recommended for everyone or every condition, and some situations call for a different approach:
If electrotherapy is not right for you, that is useful information — it points towards the treatment that is. That is the value of a proper assessment.
For knee pain, especially knee osteoarthritis, electrotherapy (usually TENS) can provide modest, short-term pain relief and help you stay active. It works best alongside strengthening exercise rather than on its own, and a physiotherapist can advise whether it suits your knee.
Used correctly, electrotherapy is very safe, with mild skin redness the most common side effect. It is not suitable for everyone — avoid it and seek advice first if you have a pacemaker, epilepsy, metal implants near the area, or are pregnant. A Chartered Physiotherapist can confirm if it is appropriate for you.
Some people feel relief during or shortly after a session, while others notice a difference only after several sessions. Effects are usually short-lived, which is why electrotherapy is used to create comfort for exercise rather than as a lasting cure on its own.
Current UK (NICE) guidance advises against using TENS or interferential therapy for low back pain and sciatica, as the evidence does not support it. For back pain, exercise-based physiotherapy and manual therapy are recommended instead. Speak to a physiotherapist about the best approach for you.
TENS targets pain signals for relief; EMS and NMES stimulate muscle contraction to support strength and rehabilitation; interferential therapy uses a deeper-penetrating current. Each suits different goals, and a Chartered Physiotherapist will recommend the most appropriate type for your condition.
A home TENS device can help manage symptoms, but it will not diagnose or treat the cause of your pain. Pad placement and settings strongly affect results. A physiotherapy assessment ensures any electrotherapy is targeted correctly and combined with the active treatment that drives recovery.
Electrotherapy can be a helpful part of easing muscle and joint pain — but only as one piece of a personalised, physiotherapist-led plan. The fastest route to lasting relief is finding out exactly what is causing your pain and treating it properly.
Book an assessmentPrefer to learn more first? Explore our electrotherapy service or our guide to the key benefits of electrotherapy.
This article is for general information and does not replace personalised advice from a qualified healthcare professional. If you have muscle or joint pain, book an assessment with a Chartered Physiotherapist to find the right treatment for you.