The client diagnosed with chronic back pain is being placed on a transcutaneous electrical nerve stimulation (TENS) unit. Which information should the nurse teach?
A) The TENS unit will deaden the nerve endings, and the client will not feel pain.
B) The TENS unit could cause paralysis if the client gets the unit wet.
C) The TENS unit stimulates the nerves in the area, blocking the pain sensation.
D) The TENS unit should be left on for an hour, and then taken off for an hour.