using tens as physiotherapy treatment for pain conditions

What Is TENS in Physiotherapy?

Transcutaneous Electrical Nerve Stimulation (TENS) is a form of electrotherapy delivered through a small, battery-powered device attached to the skin via self-adhesive electrode pads. The device generates low-voltage electrical pulses that travel through the skin to the underlying nerve fibres — hence the name "transcutaneous" (through the skin).

In physiotherapy, TENS is typically applied directly over or around the area of pain. The physiotherapist selects pulse frequency, width, and intensity based on the patient's specific condition, pain type, and tolerance. Modern TENS devices offer a range of pre-set and customisable programmes, allowing both clinic-administered and supervised home use. Unlike opioid-based pain medication, TENS carries no risk of dependency, and its side-effect profile is minimal — making it particularly well-suited to long-term chronic pain management.

According to the NHS, TENS is used for a variety of pain conditions and is generally considered safe when used as directed by a qualified healthcare professional.

How Does TENS Therapy Work? The Science Behind Pain Relief

TENS relieves pain through two distinct but complementary mechanisms. Understanding both helps explain why the right intensity and frequency settings — chosen by your physiotherapist — are critical to getting results.

The Gate Control Theory

The Gate Control Theory of pain, first proposed by Melzack and Wall in 1965 and still the dominant model in pain physiology, holds that non-painful stimuli can interfere with the transmission of pain signals. The nervous system can only process a limited number of signals simultaneously. When TENS stimulates the large-diameter A-beta nerve fibres responsible for sensation (touch, pressure), these signals compete with the smaller-diameter A-delta and C fibres carrying pain information. The result: the "gate" to the brain closes, and the perception of pain diminishes.

This is why you notice a tingling sensation during TENS use — your sensory nervous system is actively occupied, leaving less bandwidth for pain signals.

Endorphin Release

At lower frequencies (typically 1–10 Hz), TENS stimulates the release of endorphins — the body's naturally occurring opioid-like peptides. These hormones bind to the same receptors as prescription pain medication, reducing pain perception without the pharmacological risks. This mechanism is why low-frequency TENS can provide pain relief that outlasts the treatment session itself.

A 2022 evidence review published in Medicina confirmed that stimulation intensity is one of the most critical variables in TENS efficacy — a strong but comfortable sensation consistently outperforms lower intensities in clinical outcomes. Your physiotherapist will calibrate this during your assessment.

What Pain Conditions Can TENS Therapy Help With?

TENS in physiotherapy has been studied across dozens of pain conditions. The evidence base is strongest for several specific presentations. Below is a summary of where current research supports its use, followed by a detailed breakdown of each.

Sources: PubMed Fibromyalgia Meta-Analysis 2024, NCBI Neuropathic Pain Systematic Review 2025, Medicina TENS Evidence Review 2022

Chronic Musculoskeletal Pain

Chronic musculoskeletal pain — including persistent back, neck, shoulder, and joint pain — is among the most common presentations seen in physiotherapy practice. As an adjunct to manual therapy and exercise, TENS can reduce resting pain and improve a patient's capacity to participate in active rehabilitation. CK Physio's physiotherapists commonly integrate TENS with exercise prescription and manual therapy for patients managing long-standing musculoskeletal conditions.

Fibromyalgia and Widespread Pain

Fibromyalgia, characterised by widespread musculoskeletal pain, fatigue, and cognitive difficulties, is notoriously challenging to treat pharmacologically. A 2024 systematic review and meta-analysis analysing 12 controlled trials and data from 944 patients found TENS to be an effective intervention for reducing pain intensity, disability, and improving quality of life in fibromyalgia patients. An additional 2025 umbrella review published in Pain Medicine (Oxford Academic) further supports TENS as a meaningful non-pharmacological option for fibromyalgia symptom management.

Neuropathic Pain and Diabetic Neuropathy

Neuropathic pain affects an estimated 7–10% of the general population and is particularly prevalent in patients over 50 and those with diabetes. More than half of patients with neuropathic pain do not seek or receive effective treatment. A 2025 systematic review and meta-analysis confirmed TENS as an effective, non-invasive technique for improving sensitivity and reducing pain in patients with neuropathy — positioning it as a valuable first-line option where pharmaceutical approaches have limited effect or carry significant side-effect risk.

Post-Surgical and Acute Pain

TENS has demonstrated effectiveness for postoperative pain management, with systematic reviews suggesting benefit when applied at adequate stimulation intensities. For acute injuries, TENS may allow patients to remain more mobile during the early phases of recovery, which supports rather than delays the rehabilitation process.

Osteoarthritis and Joint Pain

For knee osteoarthritis specifically, the Versus Arthritis charity and the Cleveland Clinic both recognise TENS as a supported modality. A wearable TENS device (actiTENS) showed effectiveness over weak opioids for knee osteoarthritis pain in a randomised controlled trial published in 2024. TENS can also be used alongside other osteoarthritis management strategies, including hydrotherapy and exercise-based rehabilitation.

Sources: PubMed 2024, Medicina 2022, Dove Press TENS Advancements 2025

What Are the Benefits of TENS Therapy in Physiotherapy?

Beyond pain relief itself, TENS offers a distinctive set of practical advantages that make it well-suited to ongoing pain management in both clinical and home settings.

Drug-Free Pain Management

TENS provides meaningful pain relief without opiates, anti-inflammatories, or other medications. For patients managing long-term conditions, this reduces both the risk of dependency and the cumulative side-effect burden of chronic pharmaceutical use. It can be used independently or to reduce the required dose of medication under medical supervision.

No Significant Side Effects

The most commonly reported adverse effect is mild skin irritation or redness at the electrode site — typically caused by sensitivity to the adhesive on electrode pads. This can usually be resolved with hypoallergenic tape or carbon-based electrodes. TENS does not carry systemic risks and has no known drug interactions.

Supports Active Rehabilitation

Chronic pain is a major barrier to exercise. If a patient's pain level is sufficiently reduced by TENS, they can participate more fully in physiotherapy exercises and movement programmes — which address the underlying cause of pain rather than just managing symptoms. This is why TENS is commonly prescribed by physiotherapists as part of a broader treatment plan rather than as a standalone intervention.

Usable Between Clinic Appointments

Unlike many physiotherapy modalities that require clinical equipment, TENS can be used at home with appropriate training and a prescribed device. CK Physio's physiotherapists educate patients on safe self-administration, enabling continuous pain management between sessions and greater patient autonomy over their own recovery.

Compact, Portable, and Cost-Effective

Modern TENS devices are small enough to wear under clothing and discreet enough for use during daily activities. Electrode pads are reusable and inexpensive to replace. Entry-level devices suitable for home use are widely available, making TENS one of the most cost-accessible pain relief technologies available for ongoing use. 

Who Should Not Use TENS? Safety and Contraindications

TENS is safe for the large majority of adults when used correctly, but there are specific circumstances where it is contraindicated or should only be used under close medical supervision. A Chartered Physiotherapist will always conduct an assessment before recommending TENS to any patient.

The NHS advises consulting a physiotherapist or healthcare professional before using a TENS device — particularly for self-administered home use. CK Physio's team provides comprehensive instruction and personalised settings guidance so patients can use TENS safely and effectively between appointments.

What to Expect from TENS Treatment at CK Physio

CK Physio has been providing physiotherapy treatment in West London since 2003, and TENS is a well-established part of the clinic's electrotherapy toolkit. Here is what patients can expect when TENS is recommended as part of a treatment plan.

Your first appointment will begin with a thorough physiotherapy assessment. The physiotherapist will review your pain history, the nature and location of your symptoms, your medical history, and any contraindications. If TENS is appropriate, they will explain how it works and what settings are most suitable for your condition.

During treatment, electrode pads are placed on or around the painful area. The physiotherapist adjusts the frequency, pulse width, and intensity until you experience a strong but comfortable tingling sensation — not pain. Initial sessions are typically 20–45 minutes in duration. Your physiotherapist will monitor your response and adjust parameters as needed across subsequent visits.

Where home use is appropriate, CK Physio's physiotherapists will recommend a device, provide written instructions, and ensure you are confident in self-administration before you leave the clinic. Follow-up sessions allow the programme to be refined based on your progress.

TENS is frequently used in combination with CK Physio's other treatment modalities, including manual therapy and therapeutic exercise, other electrotherapy treatments, and structured rehabilitation programmes for both acute injuries and long-term conditions.

TENS vs Other Electrotherapy Treatments: How Do They Compare?

TENS is one of several electrotherapy modalities available at CK Physio. Understanding the differences can help patients understand why their physiotherapist has recommended a particular approach — or a combination of approaches.

For a detailed comparison, see CK Physio's guides to interferential therapy and the key benefits of electrotherapy in physiotherapy.

Research published in Dove Press (2025) reviewed the latest advancements in both TENS and Electronic Muscle Stimulation (EMS), confirming that while both modalities use electrical currents, they serve distinct therapeutic roles: TENS targets pain modulation, while EMS is designed for neuromuscular rehabilitation. A qualified physiotherapist will recommend the appropriate modality — or combination — based on your specific presentation.

Frequently Asked Questions About TENS in Physiotherapy

What does TENS stand for in physiotherapy?

TENS stands for Transcutaneous Electrical Nerve Stimulation. In physiotherapy, it refers to a non-invasive electrotherapy modality that delivers low-voltage electrical impulses through electrode pads placed on the skin, targeting underlying nerve fibres to modulate pain signals. It is one of the most widely used pain management tools in physiotherapy practice worldwide.

What is TENS therapy used for in physiotherapy treatment?

TENS therapy is used in physiotherapy for a range of acute and chronic pain conditions, including fibromyalgia, neuropathic pain, diabetic peripheral neuropathy, osteoarthritis, postoperative pain, neck and shoulder pain, and musculoskeletal conditions. It is commonly prescribed as part of a broader treatment plan alongside manual therapy and therapeutic exercise, but can also be used as a standalone intervention for certain presentations.

How long does pain relief from TENS therapy last?

The duration of pain relief varies between individuals and conditions. Some patients experience relief only during the session itself, while others — particularly those using low-frequency TENS for endorphin release — may benefit for several hours afterwards. Your physiotherapist will advise on the optimal session length, frequency, and whether a home TENS programme is appropriate for your specific condition.

Can TENS be used at home between physiotherapy appointments?

Yes. TENS is one of the few physiotherapy modalities that can be safely self-administered at home, provided patients have been properly assessed and instructed by a Chartered Physiotherapist. CK Physio's team recommends appropriate devices, provides written instructions, and reviews home use during follow-up appointments to ensure safe and effective application.

Are there any side effects of TENS therapy?

TENS therapy is generally very well tolerated. The most commonly reported side effect is mild skin irritation or redness at the electrode site, usually caused by sensitivity to the adhesive on electrode pads. This can typically be resolved with hypoallergenic pads or carbon-based electrodes. TENS is not advised for individuals with pacemakers, during the first trimester of pregnancy, or on damaged or infected skin. Consult your physiotherapist or GP if you have any concerns about suitability.