Reiki is a light-touch therapy intended to promote relaxation and support the body’s ability to heal itself. Developed in 1922 by Mikao Usui, a Japanese Buddhist monk, it’s built on the idea that a practitioner can channel subtle energy through their hands to balance what’s sometimes called a person’s “biofield,” or life force. More than 800 U.S. hospitals now offer Reiki as part of their integrative medicine programs, though the scientific evidence behind it remains limited and inconsistent.
The Theory Behind Reiki
Reiki rests on the concept that the body has an energy field that can become blocked or depleted, contributing to physical pain, emotional distress, or illness. The practitioner acts as a conduit, not a source. Rather than generating energy themselves, they’re believed to channel universal life force energy (called “ki” in Japanese) into the recipient’s body through their hands. The goal is to restore balance and activate the body’s own healing processes.
Five guiding principles underpin the practice, all rooted in Buddhist philosophy: do not be angry, do not worry, be grateful, work with diligence, and be kind to people. These aren’t just ethical guidelines for practitioners. They’re meant to be a daily mindset for anyone who studies Reiki, framing the practice as a spiritual discipline rather than a purely clinical technique.
What Happens During a Session
A typical Reiki session lasts 60 to 90 minutes. You lie fully clothed on a treatment table while the practitioner places their hands lightly on or just above your body in a series of 12 standard positions. Each position is held for several minutes before the practitioner moves on. The sequence generally starts at the head and works downward: hands cupped gently over the eyes, then at the temples, behind the head at the base of the skull, across the throat, over the breastbone, along the lower ribs, across the waist, over the pelvis, and finally down to the knees, ankles, and soles of the feet.
There’s no massage, no manipulation, and often very little pressure. Some practitioners don’t touch the body at all, holding their hands a few inches above each position instead. The room is usually quiet, sometimes with soft music, and the overall experience is closer to meditation than to any hands-on bodywork you might be familiar with.
What You Might Feel
People report a wide range of sensations during Reiki, and none of them are cause for concern. The most common is heat radiating from the practitioner’s hands, sometimes intense enough to feel surprising. Others feel the opposite: a cool sensation in certain areas. Tingling, pulsing, numbness, heaviness in the limbs, or a floating, weightless feeling are all frequently described.
Physical responses can be quirky. A rumbling stomach is one of the most common reactions. Throat clearing, coughing, sneezing, or sudden muscle twitches also happen regularly. Some people cry during a session, which practitioners interpret as a release of stored emotional tension. Many people simply fall asleep, which is considered a sign of deep relaxation rather than a problem. A few people report feeling temporarily tired or emotionally sensitive in the hours after a session before settling into a calmer baseline.
What the Research Shows
Reiki has been studied most extensively for pain and anxiety. A review published in Pain Management Nursing examined randomized trials and calculated effect sizes for each. The results varied dramatically depending on the population studied. For pain, the effects ranged from small (in cancer patients comparing Reiki to simple rest) to very large (in community-dwelling adults with chronic pain). For anxiety, the effects were generally smaller but still present, with the weakest results seen in women undergoing breast biopsy procedures.
One preliminary study measuring autonomic nervous system function found that heart rate and diastolic blood pressure dropped significantly in people receiving Reiki compared to both a placebo group and a control group. That suggests Reiki may activate the body’s rest-and-digest response, the branch of the nervous system responsible for calming you down after stress.
The National Center for Complementary and Integrative Health (NCCIH), the U.S. government’s authority on alternative therapies, takes a cautious position. It states that Reiki hasn’t been clearly shown to be effective for any health-related purpose, noting that most research has not been high quality and results have been inconsistent. Importantly, there is no scientific evidence supporting the existence of the energy field thought to play a role in Reiki. On the safety side, NCCIH notes that Reiki hasn’t been shown to cause any harmful effects.
Why People Use It Anyway
The gap between what the science can confirm and what people report experiencing is part of what makes Reiki polarizing. For many users, the appeal isn’t about peer-reviewed proof. It’s about spending 60 to 90 minutes in a quiet room, lying still, being touched gently by someone whose entire focus is on your well-being. That alone can lower stress hormones, slow your heart rate, and leave you feeling better, whether or not an energy field is involved.
Hospitals that offer Reiki typically position it as a complement to conventional treatment, not a replacement. It’s most commonly found in oncology departments, palliative care units, and pain management programs, where reducing anxiety and improving quality of life are central goals. About 15% of U.S. hospitals now include it in some form.
Practitioner Training Levels
Reiki training is divided into three tiers. Level I focuses on self-healing: you learn the history of Reiki, basic energy concepts, and a protocol for treating yourself. Level II expands outward, teaching you to work on other people and deepening your use of Reiki symbols (specific visual patterns used as focal points during treatment). Level III, or the Master level, involves an additional attunement and qualifies you to teach and initiate others.
There’s no single governing body or standardized certification for Reiki. Training can range from a weekend workshop to a months-long program, and quality varies significantly. If you’re choosing a practitioner, asking about their training lineage and how many hours of supervised practice they’ve completed is a reasonable starting point.