Reiki healing is a type of energy healing which originated from Japan. It is a type of japanese healing which is an alternative to medicine. 
In short, Reiki Healing is a form of complementary healing which basically relates to energy. Reiki healers make use of their palms for transferring the universal energy into their patients, in order to encourage emotional as well as physical healing in them. This technique is often referred to as the ‘Palm Healing Technique’ or the ‘Hands-on Healing technique’.
This palm healing technique promotes relaxation of the body and is effective for reducing stress as well as anxiety, simply through gentle touch.
Experts recommend that at least 4 Reiki Sessions should be attended by a person in order to take the complete benefit of it.