Reiki is a supposed healing technique that uses the "universal life force" Ki as it is called in Japan, or Chi in China to heal bodily ailments. Reiki was developed in Japan during the 2oth century and has been practiced as a form of energy healing ever since.
In a Reiki session, a Reiki Master will have the subject lie down and he or she will place their palms over strategic points on the individual's body. The "patient" is supposed to feel the transfer of this life energy being transferred into their body, restoring balance and purging ailments from the body. According to the Web Site of the International Center for Reiki Training, Reiki has been known to aid in everything from soothing of sore throats to the curing of cancer.
The term "Universal Life Force" should be a clear indication that Reiki is simply pseudoscience. This ambiguous term has never been clearly defined, nor has any reputable science found any evidence to suggest its existence. So, nobody really knows what this energy there is no actual evidence that it exists, yet people claim to be able to harness it and help cure cancer? Reiki is even too crazy for the Catholic Church, which denounces the practice and recommends Catholic Health Care organizations not to support it.
When it comes down to it, Reiki has no credibility. The supposed energy that the entire practice is supposed to based on is likely not to even exist, so the thought of controlling it is preposterous