It is one of the method of the electrical stimulation whose primary aim is to provide a degree of symptomatic pain relief be exciting sensory nerves. TENS units work by delivering small electrical impulses through electrodes that have adhesive pads to attach them to person's skin. These electrical impulses flood the nervous system, reducing its ability to transmit pain signals to the spinal cord and brain.
It is broadly categorized into 3 types:
Conventional TENS (HIGH):
- It involves the application of low intensity / high frequency current to produce strong but comfortable sensation, Its duration is 30 min.
Acupunture-like TENS (LOW):
- It involves the application of high intensity / low frequency current over muscles or accupunture points to produce strong but comfortable sensation. Its duration is less than 20 min.
Brief Intense TENS:
- It involves the application of high intensity / high frequency current. It lasts for not more than 5 minutes.