Arthritis pain has a way of shaping your whole day before it even begins. There is the stiffness that greets you before you get out of bed, the ache that settles into your knees or knuckles by mid-morning, and the unpredictable flare that arrives with a change in the weather or an hour too long on your feet. It is not dramatic. It is just relentless.

For a lot of people, that relentlessness is exactly why they start looking beyond medication. Anti-inflammatories and analgesics can help, but long-term daily use carries its own risks, and many people simply want something they can use on their own terms. A heat pack, a gentle walk, a TENS device - tools that sit alongside medical care rather than replacing it.

This post covers what TENS therapy is, how it may support joint pain management, where to place pads for common arthritis-affected joints, and how to fit it into a broader management approach. It is not a substitute for a proper diagnosis or a conversation with your GP or rheumatologist. But if you are already on that path and looking for additional options, it is worth understanding what TENS can and cannot do.

Understanding Arthritis: Osteoarthritis vs Rheumatoid

Arthritis is not one condition. The two most common types are osteoarthritis and rheumatoid arthritis, and they work differently in the body.

Osteoarthritis (OA) is a degenerative joint condition. Over time, the cartilage that cushions the ends of bones wears down, and the joint loses its smooth gliding surface. This leads to pain, stiffness, and reduced range of motion, especially in weight-bearing joints like the knees, hips, and lower back, as well as the hands and fingers. OA tends to worsen gradually with age, previous injury, or sustained joint load.

Rheumatoid arthritis (RA) is an autoimmune condition. The immune system mistakenly attacks the joint lining (the synovium), causing inflammation, swelling, and over time, joint damage. RA often affects smaller joints first - the hands and feet - and tends to occur in a symmetrical pattern. It can also affect other body systems beyond the joints. Because RA is driven by an immune process, it requires specialist medical management, including disease-modifying medications in most cases.

Both conditions cause pain and stiffness that varies with activity, time of day, and other factors. Neither has a simple fix. Management is an ongoing process, often combining medical treatment, physical therapies, lifestyle modification, and self-care tools.

How TENS and Heat Therapy May Help With Joint Pain

TENS stands for transcutaneous electrical nerve stimulation. It delivers low-level electrical pulses through the skin via conductive pads. Those pulses interact with sensory nerves in a way that may reduce the perception of pain, broadly consistent with the gate control theory of pain, which suggests that stimulating non-pain nerve fibres can interfere with pain signal transmission to the brain.

Research into TENS for arthritis, particularly knee osteoarthritis, suggests it may offer short-term pain relief and modest improvements in function for some people. Results vary between individuals, and TENS does not slow joint degeneration or alter the underlying disease process in either OA or RA.

Heat therapy works through a different mechanism. Warmth increases blood flow to the surrounding tissue, which can help reduce muscle tension, ease joint stiffness, and improve local comfort, particularly useful in the morning or after periods of inactivity when joints are at their stiffest. Combining TENS stimulation with localised heat, as the PainPod Heat device does, means you are working on both nerve-level pain modulation and tissue-level comfort at the same time.

What to Expect Realistically

TENS is a management tool, not a solution. Most people who find it useful describe it as taking the edge off - reducing pain to a level that allows them to move more comfortably, complete daily tasks, or sleep better. That is genuinely valuable for quality of life, even if it is not the same as resolving the underlying condition.

Results vary from person to person. Some people notice a difference after their first session. Others need a few weeks of consistent use to assess whether it is helping. Sessions of 20-30 minutes over the affected joint are a reasonable starting point, and timing them around activities - before a walk, or in the evening when joint pain tends to peak - can make the experience more useful.

Pad Placement for Common Arthritis-Affected Joints

Where you place the pads matters. The goal is to position them so the electrical stimulation passes through or around the joint where you feel pain.

Knees

The knee is one of the most common OA sites. Place one pad on either side of the kneecap (medial and lateral) or position them above and below the joint if the discomfort is more generalised. Avoid placing pads directly over broken skin, active swelling, or inflamed tissue during a flare.

Hands and Fingers

For hand and finger joints, more often affected in RA, place the pads on the back and palm of the hand, straddling the affected joints. The pads should not overlap. Given the smaller surface area, use low intensity settings and assess comfort carefully.

Hips

Hip arthritis pain is often felt deep in the groin or the outer hip. For the outer hip, place pads on the side of the hip over the most painful area. For groin-referred pain, pads can be positioned on the upper thigh and lower hip. Because the hip joint sits deep, TENS is generally more effective for the surrounding muscle tension and referred pain than for the joint itself.

Shoulders

Shoulder OA or inflammatory joint pain can limit overhead reach and disturb sleep. Place one pad over the front of the shoulder and one toward the back (posterior deltoid area), framing the joint. Adjust positioning based on where you feel the most discomfort.

When to See a GP or Rheumatologist Instead of Self-Managing

TENS and self-care tools are most appropriate as adjuncts to a diagnosed and managed condition. They are not a first response to undiagnosed joint pain.

If you have already been diagnosed with RA, your rheumatologist should be your primary point of contact for any significant changes in symptoms. TENS may be something you use between appointments for comfort, but it does not replace the disease-modifying treatment that manages the autoimmune process itself.

Do not use a TENS device over joints that are acutely inflamed during a flare without first discussing it with your health professional.

Fitting TENS Into a Broader Arthritis Management Plan

TENS works best as one layer of a broader approach. Arthritis management generally draws from several areas at once.

Movement and exercise remain among the most consistently supported approaches for both OA and RA. Low-impact activity - swimming, cycling, walking, hydrotherapy - helps maintain joint mobility and the muscle strength that supports affected joints. A physiotherapist can design a program appropriate to your specific condition and joints.

Physiotherapy also covers manual therapy, joint protection strategies, and movement retraining that TENS cannot replicate. If you have not seen a physio for your arthritis, it is worth asking your GP for a referral.

Medical treatment, including anti-inflammatories, corticosteroid injections, or disease-modifying drugs for RA, remains central for many people. TENS is not a reason to reduce or stop prescribed medication. Discuss any changes with your doctor.

Weight management reduces load on weight-bearing joints and can have a meaningful effect on OA symptoms in the knees and hips. This is often underemphasised as a practical lever.

TENS and heat therapy can slot into this broader picture as a self-management tool, available at home, usable on your own schedule, and without the side-effect profile that comes with long-term medication use. For people managing a long-term condition, that kind of accessible daily support can add up.

If you are looking at TENS options designed specifically for joint pain and heat therapy, the PainPod Heat is worth looking into. It combines electrical stimulation with localised heat and uses its own conductive pads, making it a practical choice for home-based joint pain management.

Frequently Asked Questions

Can a TENS machine help with arthritis pain?

TENS may help reduce the perception of joint pain in some people with arthritis, particularly osteoarthritis. It works by stimulating sensory nerves in a way that can interfere with pain signals. It does not alter the underlying joint condition, but it may make pain more manageable on a day-to-day basis.

Is TENS safe to use if I have rheumatoid arthritis?

TENS is generally considered safe for use in RA, but you should consult your rheumatologist before starting, particularly if you have active inflammation or joint flares. Do not use TENS directly over acutely swollen or inflamed joints without professional guidance.

Where do I put TENS pads for knee arthritis?

For knee arthritis, place the pads on either side of the kneecap (medial and lateral), or above and below the joint if the pain is more diffuse. The stimulation should pass through or around the joint. Follow the placement guide included with your device.

How long should I use a TENS machine for arthritis?

A session of 20-30 minutes over the affected joint is a reasonable guide. You can use TENS multiple times a day if needed, but always follow the directions for use that come with your specific device.

Can TENS replace my arthritis medication?

No. TENS is a self-management tool that may support comfort and pain management. It does not replace medical treatment for arthritis, and you should not stop or reduce any prescribed medication without talking to your GP or specialist.

Is heat therapy useful for arthritis, or does it make inflammation worse?

Heat therapy is generally more suitable for stiffness and chronic joint aching than for acute, hot, swollen joints. During a flare, when a joint is actively red, hot, and swollen, cold therapy is often preferred. If you are unsure which is appropriate for your situation, ask your physiotherapist or GP.

References

1. Vance CG, Dailey DL, Rakel BA, Sluka KA. Using TENS for pain control: the state of the evidence. Pain Manag, 2014
2. Melzack R, Wall PD. Pain mechanisms: a new theory. Science, 1965
3. Australian Institute of Health and Welfare - All arthritis
4. Arthritis Australia - Managing arthritis

PainPod devices are intended for general wellness, pain management, and recovery support. They are not a substitute for medical advice, diagnosis, or treatment. Always consult a qualified health professional for persistent or worsening symptoms.