Q: Is there anyone who should not use TENS?


There are no known side effects to TENS use and long-term TENS use is not harmful.

These can arise but are very rare. The following points are worth noting:

Do not:

  • Ignore any allergic reaction to the electrodes : If a skin irritation develops, discontinue use and consult a doctor or medical professional
  •  Apply electrodes to broken skin
  • Apply electrodes to skin which does not have normal sensation. If the skin is numb, too great an intensity may be used, possibly resulting in a minor burn


Do not:

  • Immerse your TENS unit in water or place it close to excessive heat
  • Attempt to open up the TENS unit. There are no user-serviceable parts inside
  • Use rechargeable batteries (unless recommended in the manual) as the voltage is unsufficient
  • Mix old and new batteries. Be sure to dispose of old batteries safely

Do :

  • Remove batteries from your TENS machine if the unit is unlikely to be used for a long period.

Do not use TENS or EMS:

  • If you have a heart pacemaker or have a heart rhythm problem
  • If you have epilepsy
  • During the first six months of pregnancy
  • When driving or operating machinery
  • If you are suffering from acute, feverish or infectious diseases
  • Near heart monitors or alarms
  • To mask or relieve undiagnosed pain

Do not place electrodes in these places:

  • On the carotid arteries in the front of your neck
  • Over your eyes
  • Across the front of the head
  • On the abdomen if you are pregnant
  • On the heads of children under 12
  • Near malignant tumours

Do not start your TENS treatment until the cause and source of pain has been diagnosed by a medical practitioner. If you are in any doubt about any of these warnings you MUST consult your medical adviser.

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