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Side Effects of Overusing a TENS Machine

by
author image Suann Schuster
Suann Schuster has been working as a freelance writer since 2004. She served as an item writer for McGraw-Hill Education and a curriculum author. Schuster now provides content for Science and Massage Therapy texts for McGraw-Hill, as well as for test banks. She holds a Ph.D. in psychology from the University of Sedona.
Side Effects of Overusing a TENS Machine
A woman is using a TENS machine. Photo Credit Aykut Erdogdu/iStock/Getty Images

Overview

A TENS machine -- trancutaneous electrical nerve stimulator machine -- overrides pain receptors in the brain. When used properly, side effects of TENS machines are generally mild, even with extended use. If you experience these negative effects with use of your TENS unit, discontinue use and see your health care provider.

Pain

The constant pulsing of electrical stimulation from the TENS machine can cause pain and muscle twitching, particularly if you adjust the intensity too high. This may also cause muscle soreness. Lower the intensity until you feel a strong tingling sensation -- without muscle twitching -- if this occurs.

Skin Irritation

TENS units are recommended for long-term use, but the pads should be periodically removed to assess your skin. Cleaning your skin before you apply the pads will help the pads stick and appropriately disperse the current in the area underneath the pads, decreasing your risk of skin irritation. Periodically changing the position of the pads will also help protect your skin.

Warnings

Talk to your doctor before using a TENS if you are pregnant -- the effects of the vibrating impulse on the unborn fetus are unknown. Do not sleep with your TENS unit on, submerge it in water or wear it while driving. TENS machines should not be used on the skin near the eyes, temples or across the head, or if you have a pacemaker.

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