Where not to put TENS pads: a plain-language checklist

Where should you not put TENS pads?

Do not place electrode pads on broken, irritated, infected or numb skin. Do not place them on your head, face, throat, eyes or mouth. Do not place them on both sides of your chest or trunk at once. This list comes from the NHS and University of Iowa Health Care (UIHC), and the two lists are not the same.

A TENS unit sends mild electrical pulses through pads on the skin to relieve pain. Where the pads sit matters for safety. This post is general information. Your clinician and the instructions for your device decide your exact placement.

What do the three sources say, side by side?

The table compares what each page lists. A blank cell means the page does not mention that area, not that the area is safe.

Notice that the neck wording differs. The NHS says “your neck.” UIHC says “any part of your throat.” Cleveland Clinic says “neck (front or side).” If you have neck pain, ask your clinician exactly where pads may sit for you.

Why does skin condition matter so much?

Pads carry the current into the skin. Skin that is cut, rashy, swollen, infected or numb is a poor place for that. Numb skin may not warn you if something is wrong, because you cannot feel it normally.

UIHC says to stop using TENS and talk with your doctor or health care team if you have skin irritation (redness, rash, itching). The NHS says the same in its own words: if skin becomes itchy, irritated or red, turn off the machine and remove the pads. The NHS also notes that redness may be harder to see on brown or black skin. Our glossary explains skin irritation.

Where can pads go?

The NHS says to place the sticky pads onto clean skin, near the painful parts of your body, and to leave a gap between the pads. UIHC says to try to surround the painful area and to use fleshy areas, “not over boney sites.”

UIHC adds these rules about the pads themselves:

1. Put pads on clean, dry skin so they make firm contact.
2. Pads should not touch each other or any metal object, such as a belt buckle or metal jewelry.
3. Turn the unit off before you put on, move or take off the pads.
4. Do not share your pads with other people.

The NHS adds that a healthcare professional, such as a GP, physiotherapist or midwife, can advise you where to put the pads if you are not sure. For placement pictures by pain area, read our TENS pad placement guide.

Which health conditions change the answer?

Placement is only part of safety. Some conditions mean you should not use TENS at all, or should ask first. The NHS says do not use TENS if you have epilepsy, have a pacemaker, or are pregnant unless your doctor or midwife tells you to. UIHC says not to use TENS with a cardiac pacemaker or defibrillator, a spinal cord stimulator, in-dwelling pumps or monitors, or any implanted metallic or electronic device. Read more in our post on TENS units and pacemakers.

A contraindication is a reason a treatment should not be used for a person. Cleveland Clinic lists several, and ends with: “Always check with your healthcare provider before using TENS, especially if you have existing health conditions.”

What about moving the pads during a session?

Turn the unit off first. UIHC says electronic equipment, such as EKG monitors and alarms, may not work the right way when TENS is in use. It also says you can get shocked if you reposition or take off the pads, or remove the wires from the pads, without first turning the unit off.

If a pad will not stay in place, UIHC suggests steps such as cleaning the skin, using a skin prep product, or asking your health care team for instructions on medical tape. See our post on how to clean and store TENS electrode pads.

Next step

Show your clinician where you plan to place the pads and ask if each spot is right for you. Read the TENS unit safety guide, then call Analgesic Healthcare at (800) 749-1188 or use contact with questions about getting a unit.

This page gives general information, not medical advice. Talk with your doctor or physical therapist about your own care, and follow your clinician's and your device's instructions. In an emergency, call 911.