Reiki is a reasonable start for exploring how energy informs health and wellness. For those who are ready to study energy healing deeply, move beyond Reiki. Taking the work up a few levels beyond Reiki is an important next step in becoming a practitioner who serves a wide spectrum of issues and people.
Practitioners in various modalities choose to integrate energy healing into their work because of the ubiquitous nature of energy as root cause of all disease, illness, mental, emotional and spiritual issues. Can a tree, bird, chair or person exist without energy? No. Not possible. Neither can an illness, disease or mental blockage. Whatever your expertise, energy is in the room with you.