What technique is primarily used for relieving pain through electrical stimulation?

The technique primarily used for relieving pain through electrical stimulation is TENS therapy, which stands for Transcutaneous Electrical Nerve Stimulation. This method involves the application of low-voltage electrical currents to the skin via electrodes. The electrical impulses generated by the TENS unit are believed to interfere with the pain signals sent to the brain, effectively reducing the perception of pain. Additionally, TENS therapy can stimulate the release of endorphins, the body's natural painkillers, further contributing to pain relief.

In contrast, cognitive therapy focuses on changing negative thought patterns and behaviors rather than providing physical relief. Massage therapy involves the manipulation of soft tissues to relieve tension and improve circulation, but it does not utilize electrical stimulation. Occupational therapy is aimed at helping individuals perform daily activities and increase their functional independence, without the primary use of electrical stimulation techniques for pain relief. Thus, TENS therapy is specifically tailored for pain management through the mechanism of electrical stimulation, making it the correct choice.