Transcutaneous electrical nerve stimulation (TENS) and electroacupuncture (EA) are two nonpharmacologic approaches that help relieve pain using mild electrical currents. While TENS units use pads attached to the skin, an electroacupuncture device can go deeper into the tissue by piercing the skin with very thin needles. Both electrotherapies can be safely used as part of an integrated treatment and have shown a similar hypoalgesic effect in patients with rheumatoid arthritis or knee osteoarthritis.