The word "Reiki" comes from two Japanese words; Rei, meaning Spirit or universal intelligence, and Ki, meaning life-force energy (Japanese version of Qi). In a reiki treatment, life-force energy is transmitted through the practitioner's hands, and Spirit guides that energy.
Reiki can help relieve symptoms of anxiety and depression, help with insomnia and fatigue, and assist in pain relief, including body aches and headaches.