Reiki is an alternative therapy that helps people relax and heal while reducing stress. Reiki is based on the concept that unseen life force energy runs through the body, and that when it is low, we are more prone to illness. When our life energy is high, on the other hand, we are joyful and healthy. Reiki, like acupuncture, encourages the flow of life energy throughout the body. Energy can become stuck in the body when physical injury or psychological suffering has occurred.