Reiki is a Japanese healing technique that is used for stress reduction and relaxation and literally translates as Spiritual Energy.
Rei represents the Holy Spirit, Mystery, Gift, Nature Spirit or Invisible Spirit.
Ki represents the Physical Energy of Nature, Talent or Feelings.
Administered by "laying on hands" and is based on the idea that an unseen "life force energy" flows through us and is what causes us to be alive.
If one's "life force energy" is low, then we are more likely to get sick or feel stress.
If it is high, we are more capable of being happy and healthy.
Reiki is not a substitute of conventional medicine, but it can be a useful complimentary therapy.