The word Reiki is a Japanese word - Rei which means "God's Wisdom or the Higher Power" and Ki which is "life force energy". Reiki means "spiritually guided life force energy."
Reiki is a healing tool brought from the Buddhist texts by Mikao Usui. He was from Japan and went to the Tibetian monasteries to understand the healing method. After 21 days of meditation in the mountains, he was initiated by a light and given some symbols for the benefit of mankind.
Reiki is a very safe method of spiritual healing and self-improvement that everyone can benefit from. The simple and natural approach makes it easy to understand and follow. It is a very effective tool in helping virtually every known illness and malady and is safe for the giver and the receiver. It also works in conjunction with all other medical or therapeutic techniques to relieve side effects and promote recovery.
In my research, I have used Reiki effectively to clear the negative happening of a subject. Once the life force is improved the recovery happens easily.
One needs an initiation from the master to start practicing this healing technique. After the process the symbols and methods are taught by the expert for daily practice.