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nerve-wracking - extremely irritating to the nerves; nerve-racking noise; the stressful days before a war; a trying day at the office. nerve-racking, stressful, trying. disagreeable - not to your liking; a disagreeable situation.
TENS, or transcutaneous electrical nerve stimulation, is a back pain treatment that uses low voltage electric current to relieve pain. TENS is typically done with a TENS unit, a small battery-operated device.The device can be hooked to a belt and is connected to two electrodes.here is little research to support how -- or even if -- TENS really works. Its use dates back to the 1960s with the introduction of the gate control theory of pain. According to the theory, stimulating nerves closes a gate mechanism in the spinal cord, and that can help eliminate the sensation of pain.