Reiki is a form of energy therapy.
Despite scepticism in some circles, it is growing in popularity.
It involves the transfer of energy by laying on hands.
Reiki's advocates say it can treat many conditions and emotional states.
Small studies show that Reiki can slightly reduce pain, but no studies have shown that it is effective in treating any diseases.
Some hospitals in America and Europe offer Reiki, but insurance rarely covers it.
The word "Reiki" means "mysterious atmosphere, miraculous sign." It comes from the Japanese words "rei" (universal) and "ki" (life energy). Reiki is a type of energy healing.
Energy healing targets the energy fields around the body.
According to practitioners, energy can stagnate in the body where there has been physical injury or possibly emotional pain. In time, these energy blocks can cause illness.