Developed by Japanese Buddhist Mikao Usui in 1922, Reiki is a spiritual energetic healing technique based on the idea that an unseen "life force energy" flows through us and is what causes us to be alive. The Reiki practitioner channels this Universal Life source energy in and through their body, transfering it through their hands into the patient to facilitate the patient's process of healing, supporting the body's natural ability to heal itself.
Reiki is a combination of the Japanese words "rei" (universal) and "ki" (life source energy). It is a gentle universal energy that intelligently directs itself to the places in your body, mind and soul that need healing.
Reiki is a simple, natural and safe method of spiritual healing and self-improvement that everyone can use. It has been effective in helping virtually every known illness and malady and always creates a beneficial effect. It also works in conjunction with all other medical or therapeutic techniques to relieve side effects and promote recovery.
The beneficial effects during and after a treatment include relaxation and feelings of peace, security and well-being.
Many have reported miraculous results.
Here is an article with a more specific scientific explanation of how Reiki works