TNS uses extremely small amountts of electrical current (millionths of an amp) to help relieve pain and heal soft tissues of the body. It is listed in the AMA CPT Code Book as a surgical procedure.

Injury to the body disrupts its normal electrical activity. TNS produces electrical signals like those naturally occurring when the body is repairing damaged tissues. By applying similar electrical currents, the healing process is enhanced.

The electrical current used in TNS is so small that it's rarely felt. However, the water-moistened electrodes or gel used to conduct the current may seem cool when first applied.

TNS is often recommended in cases involving soft tissue inflammation or muscle spasm. Since TNS mimics the body's electrical fields it is helpful in relieving pain and stimulating the healing of soft tissues.