Galvanic, or direct current, is a form of electrotherapy treatment. The electrical current, rectified to a safe, low-voltage level is applied to the body via electrodes placed on the skin. Galvanic current is usually applied by a qualified professional, via a machine in their clinic.

The flow of current through an effected region may reduce pain by inhibiting pain receptors. As it is also thought to enhance the transport of ionized substances through the skin, it can also be used to promote the resorption of topical drugs such as anti-inflammatory creams (this process is called iontophoresis). It works by distracting nerves and the brain from the pain sensations.