TENS Unit Pad Placement Chart & Safety

Short answer: With the TENS unit switched off, place pads on clean, dry, intact skin near or around the painful area. Keep every pad separated and position them so the tingling covers the intended area. Never place pads on the front or sides of the neck, head, broken or numb skin, or in a pattern that sends current across the chest.

KONGZEE dual-channel TENS unit connected to four separated electrode pads — Switch the unit off before applying or repositioning pads, then begin at the lowest intensity.

TENS Unit Pad Placement Chart

Area	General Starting Position	Avoid
Lower back	On the muscles to either side of the painful area	Directly over the spine or across the torso
Shoulder	On the muscular back or side of the shoulder	Front or sides of the neck; chest-to-back placement
Knee	On soft tissue above, below or beside the painful area	Fresh incisions, irritated skin or numb areas
Tennis elbow	On forearm muscles above and below the tender area	Directly over irritated skin or the bony point of the elbow
Calf	On the calf muscle around the uncomfortable area	Unexplained swelling, suspected clot or reduced sensation
Foot	On intact soft tissue near the painful area, with pads separated	Broken skin, numb areas or placements that impair walking

This chart provides general educational guidance, not a prescription for a specific injury. Placement for surgery recovery, diagnosed nerve conditions, unexplained pain or reduced sensation should come from a healthcare professional.

Five Rules Before Placing TENS Pads

Read the instructions for your specific TENS unit and electrodes.
Switch the unit off before connecting, applying, removing or repositioning pads.
Wash and completely dry the skin. Avoid lotion, oil, cream, powder, cuts and irritation.
Inspect each pad. Replace it if the gel is dry, damaged or lifting.
Start at the lowest intensity and increase slowly to a strong but comfortable tingling sensation.

The NHS TENS guide advises placing pads on clean skin near the painful area and leaving a gap between them. The Royal National Orthopaedic Hospital recommends placing pads on either side of the painful area at least 2.5 cm (1 inch) apart.

Active woman using a gentle side stretch to identify the muscular lower-back area — Identify the muscular area carefully; unexplained or severe pain requires professional assessment.

Lower Back TENS Unit Placement

Place pads on the muscles to the left and right of the painful lower-back area rather than directly over the spine. For a broad area, use a separated pair on each side if your device manual supports four-pad use. Do not arrange the electrodes so current travels through the torso.

Severe, unexplained or radiating lower-back pain, weakness, changes in bladder or bowel control, fever or recent trauma requires medical assessment rather than self-directed electrode placement.

Shoulder TENS Unit Pad Placement

For general shoulder TENS unit placement, use the muscular back or side of the shoulder, with pads surrounding the uncomfortable area. Keep electrodes away from the front and sides of the neck. Never pair an electrode on the chest with one on the upper back because that can direct current across the chest.

Following surgery, a dislocation or a suspected tendon tear, use only the placement approved by your surgeon or physiotherapist.

Knee Pad Placement

Place pads on soft tissue above, below or beside the painful part of the knee while keeping them separated. Do not place electrodes over a fresh incision, infected or irritated skin, or an area with reduced sensation. Follow your clinician's instructions after knee replacement, ACL repair or another operation.

Tennis Elbow and Forearm Placement

A general starting point is the forearm muscle above and below the tender outer-elbow area rather than directly on the bony point. Keep pads separated. If pain follows an injury, causes weakness or numbness, or does not improve, ask a clinician to confirm the cause and placement.

Calf and Foot Placement

For muscular calf discomfort, pads may be placed on intact calf muscle around the painful area. For the foot, use intact soft tissue near the target area and make sure leads and pads do not create a trip hazard. Do not apply TENS over numb skin or use it for unexplained one-sided calf swelling, warmth or redness; seek urgent medical advice because those symptoms can have causes that TENS does not address.

Sciatica and Radiating Pain

Sciatica has different causes and may require assessment. General lower-back placement may use the muscles above the buttocks on either side of the spine. Do not follow numb skin down the leg with electrodes without professional guidance.

Where TENS Pads Should Never Go

Front or sides of the neck
Head, temples, eyes or mouth
Broken, infected, inflamed, irritated or numb skin
Chest and upper back at the same time
Any pattern that directs current across the chest
Areas where pad leads could interfere with driving, tools or safe movement

Do not use TENS while sleeping, bathing, driving or operating machinery. Ask a healthcare professional before use if you are pregnant or have a pacemaker or another implanted electronic device, epilepsy, heart disease, cancer, circulation problems or reduced sensation. Review the TENS unit contraindications checklist before choosing a placement. For the most commonly misunderstood area, review the neck placement safety rules and areas to avoid.

KONGZEE replacement TENS electrode pads in multiple shapes and sizes — Choose a compatible pad size that can lie flat on intact skin without crossing a prohibited area.

Pad Care Affects Placement and Comfort

A dry or partly detached pad can produce uneven or uncomfortable stimulation. Read how to clean TENS unit pads and make them sticky again, return reusable electrodes to their backing after use, and replace them when they no longer adhere evenly. KONGZEE 12-pack replacement TENS pads use a standard 2mm pin connector; verify compatibility before ordering.

Frequently Asked Questions

How far apart should TENS pads be?

Keep pads separated. RNOH recommends at least 2.5 cm (1 inch), while some clinical guides recommend approximately one pad width. Follow your device manual if it specifies a greater distance.

Can I move TENS pads while the unit is on?

No. Switch the device off before applying, removing or repositioning any electrode.

Should TENS pads go directly on the painful spot?

They are commonly positioned near, around or on either side of the painful area. The correct position depends on the condition and sensation. Ask a clinician for individualized placement when the cause is uncertain.

Can I put TENS pads directly on my spine?

General lower-back placement uses the muscles on either side of the spine rather than directly over it.

Can I use TENS pads on my neck?

Do not place electrodes on the front or sides of the neck. Upper-back or shoulder placement should remain on the muscular area away from the throat and should not send current across the chest.