Reiki is a Japanese healing technique that involves the transfer of energy through the practitioner's hands to promote relaxation, reduce stress, and facilitate healing. During a Reiki session, clients lie down fully clothed while the practitioner places their hands lightly on or above different parts of the body. The energy flow helps to balance the client's energy centers (chakras) and promote a sense of well-being and harmony on physical, emotional, mental, and spiritual levels. Reiki can help alleviate pain, improve sleep, boost the immune system, and enhance overall health and vitality.