Reiki (pronounced Ray-key) is a Japanese name consisting of 2 words Rei and Ki meaning spiritually guided life energy (commonly known as Universal Life Energy), an energy which animates us all and is found all around us.
Reiki is a form of spiritual healing using "universal life energy" channelled through the practitioner to the recipient.
Reiki helps to harmonize body, mind and spirit for yourself or anyone you want to help.

Reiki treatment
You relax, fully clothed, on a couch or seated while the healer holds his hands on or above you. A treatment can last an hour or longer depending on the treatment required. In the western world many practitioners use the standard hand positions and commonly a full treatment is given covering all the important organs of the body.
There is no pressure on the body making it ideal for treating all ages and conditions, sometimes hands are even held away from the body. The energy flows wherever it is required (spiritually guided) and can normally be felt as a warm sensation or tingling in the body. Receiving Reiki is a very relaxing and soothing experience!

Reiki is an effective healing method
Reiki can be used for many ailments like reducing stress, relieving pain, headaches, stomach upsets, back problems, asthma – respiratory problems, PMT, menstrual problems, sinus, anxiety and many more. You can find treatment suggestions for specific problems under the button "How to use Reiki". (Please observe that Reiki should never be used instead of medical treatment, it should be used as a compliment and a way to become and remain healthy.)

There is no belief system attached to Reiki so anyone can receive a Reiki treatment or a Reiki attunement. As in any healing the first step towards a healthier life is a desire to be healed.

Reiki – a powerful and gentle healer

* Promotes natural self-healing
* Balances the energies in the body
* Balances the organs and glands
* Strengthens the immune system
* Treats symptoms and causes of illness
* Relieves pain
* Clears toxins
* Adapts to the natural needs of the receiver
* Enhances personal awareness
* Relaxes and reduces stress
* Promotes creativity
* Releases blocked and suppressed feelings
* Aids meditation and positive thinking
* Heals holistically

Reiki is easy to learn
Anyone can "learn" Reiki.
References :
http://www.reiki.nu/reiki/reiki.html