TENS Units for Pain Relief
How Does a TENS Unit Work?
TENS units (short for Transcutaneous Electrical Nerve Stimulation) are small devices that use low-voltage electrical pulses to help relieve pain. They send gentle signals through your skin to target nerves, muscles, and tissues — all in an effort to reduce discomfort and improve how your body feels and functions.
You’ll find TENS units in all shapes and sizes: From compact, portable models made for home use, to more advanced systems used by physical therapists and clinics.
If you're looking for a drug-free way to manage chronic or occasional pain, a TENS unit might be a great option to try — whether it’s for your back, shoulders, knees, or more.
Block pain transmission to the brain
In the case of illnesses or injuries, we only perceive pain when the corresponding pain signals from the affected area reach the brain.High-frequency TENS superimposes the pain signals, blocking their transmission to the brain. As a result, you do not perceive the pain.
Stimulation of endorphin release
The human body has a natural pain control mechanism. An essential part of this is the release of happiness hormones in the body, which reduce the sensation of pain. These are called endorphins. By using the low frequency "burst" mode of a TENS machine, the body is externally stimulated to release endorphins and thus reduce pain.
What kind of pain does a TENS unit help you with and where do I place the electrodes?
TENS machines can be used by healthcare professionals or individuals at home to relieve chronic or acute pain caused by a variety of conditions such as arthritis, back pain, neck tension, sciatica, headaches, muscle spasms, sports injuries and more. The electrodes are usually placed on the affected area for up to 30 minutes per session; however, this can vary depending on the needs of the individual. We have programme recommendations and electrode placements for the following types of pain:
What you've been curious about
FAQ TENS Units
What does TENS mean?
TENS stands for Transcutaneous Electrical Nerve Stimulation.
What conditions can a TENS unit help with?
TENS units are commonly used for back pain, arthritis, muscle soreness, joint pain, and neuropathy. They are intended for temporary pain relief and not as a cure.
Is a TENS unit safe to use?
Yes, TENS units are generally safe for most people when used according to the instructions. Avoid use if you have a pacemaker, epilepsy, or heart conditions unless approved by your doctor.
How long should I use my TENS device each day?
Typical sessions last 25–45 minutes, up to 3 times per day. Follow the device's instructions for use and consult a healthcare professional if unsure.
Do I need a prescription for a TENS unit in the US?
No, most TENS devices are available over-the-counter and do not require a prescription.
Can I use a TENS unit during pregnancy?
TENS units are not recommended during pregnancy unless prescribed by a healthcare professional. Always consult your doctor first.