Reiki is not actually a form of massage, despite the two being frequently grouped together in spa menus and wellness directories. It is an energy-based practice in which a trained practitioner places their hands lightly on or just above your body, aiming to channel what practitioners describe as universal life-force energy to promote relaxation and healing. Unlike massage, which involves physical manipulation of muscles and soft tissue, Reiki requires little to no pressure and sometimes no physical contact at all. The confusion between the two is understandable, since both happen on a treatment table and both claim to reduce pain and stress, but they work through entirely different premises.
Where Reiki Came From
Reiki originated in Japan in the early twentieth century. Its founder, Mikao Usui (1865–1926), reportedly developed the system after a transformative experience during a 21-day meditation retreat on Mount Kurama. He built a practice centered on transmitting what he called universal energy through specific hand placements. A physician named Chujiro Hayashi, one of Usui’s students, later created a more structured teaching curriculum. Hayashi’s student Hawayo Takata then brought Reiki to the United States in the 1930s, adapting it for Western audiences and establishing formal training programs that led to its spread across North America and Europe.1Holistic Nursing Practice. Reiki in Contemporary Healthcare: Historical Development, Theoretical Foundations, Biofield Mechanisms, and Therapeutic Applications – Section: HISTORY OF REIKI
Modern Reiki is typically taught in three levels. Level I covers self-treatment and basic hand positions. Level II introduces distance healing and the use of symbols. Level III, sometimes called the Master level, qualifies a practitioner to teach others. The “attunement” process, in which a Reiki Master ceremonially opens a student’s ability to channel energy, is considered essential to the tradition. This attunement is what distinguishes a trained Reiki practitioner from someone simply placing their hands on another person, and it becomes a central issue in research, as we will see.
What Happens During a Session
A typical Reiki session lasts between 30 and 60 minutes. You lie fully clothed on a treatment table while the practitioner moves through a series of hand positions, usually starting at the head and working down through the torso and limbs. The hands rest gently on the body or hover a few inches above it. Some practitioners follow a fixed sequence of 12 to 15 positions; others let their intuition guide them to areas they sense need attention. There is no kneading, no stretching, and no joint manipulation.
In hospital settings, sessions are sometimes shorter. One randomized trial of cardiac surgery patients used 20-minute sessions of nurse-delivered Reiki applied to five body areas over three consecutive days.2Journal of Cardiovascular Nursing. Randomized Controlled Trial of the Psychological and Clinical Outcomes of Reiki Plus Manual Therapy After Open Heart Surgery Another trial in cancer outpatients offered single sessions during infusion treatments.3Journal of Pain and Symptom Management. Evaluation of an Outpatient Reiki Program for Cancer and Other Chronic Illnesses Receiving Infusion Treatments at Two University Hospitals The format is flexible, which is part of why it has been adopted in clinical environments where longer interventions would be impractical.
The Proposed Mechanism
The honest answer to “how does Reiki work?” is that no one has established a clear, widely accepted mechanism. Practitioners describe channeling a form of subtle energy through their hands into the recipient’s body. Researchers have tried to frame this in terms of biofields, the measurable electromagnetic fields that living tissues generate. One theoretical model proposes that bioelectric, biomagnetic, and other fields around the body interact with cells and tissues to form an integrated communication system, and that energy therapies like Reiki might tap into this system.4International Journal of Complementary & Alternative Medicine. Human biofield components explained: a tensegrity-based biophysical framework for energy medicine Some earlier research reported that healing practitioners could project pulsating biomagnetic fields from their hands.5Journal of Bodywork and Movement Therapies. What is ‘healing energy’? Part 2: measuring the fields of life
These ideas are speculative. A systematic review of physiological changes in practitioners during healing found that the most commonly measured biomarkers were brain-wave patterns and heart rate variability, but the brain-wave changes were inconsistent and not specific to biofield therapies.6PubMed. Biofield-based therapies: a systematic review of physiological effects on practitioners during healing One intriguing finding is that during Reiki sessions, brain-wave coherence in the theta range increased between practitioner-recipient pairs compared to sham pairs, particularly over the left hemisphere.7PubMed. Enhanced coherence within the theta band between pairs of brains engaging in experienced versus naïve Reiki procedures Whether this reflects a meaningful energy transfer or simply the neurological footprint of a shared relaxation experience remains an open question.
The more pragmatic explanation, and the one skeptics tend to favor, is that Reiki’s benefits come primarily from the deep relaxation induced by lying still in a calm environment while another person pays quiet, focused attention to your body. This would place Reiki’s mechanism closer to meditation or guided relaxation than to any novel form of energy transmission. The clinical evidence, as it turns out, does not clearly settle the debate.
How Reiki Differs from Massage
Since the two are so often conflated, the differences are worth spelling out. Massage therapy involves direct physical manipulation of muscles, tendons, and connective tissue. The mechanisms are well-understood: pressure increases blood flow, loosens adhesions, and triggers the release of endorphins. Reiki involves no tissue manipulation at all. A licensed massage therapist needs hundreds of hours of anatomy and physiology training; a Reiki practitioner needs an attunement and training in hand positions but no formal study of musculoskeletal anatomy.
A few studies have directly compared the two. In one randomized trial of women recovering from abdominal hysterectomy, the Reiki group showed significantly greater reductions in pain intensity and analgesic use than both the back massage group and the control group. Vital signs in the Reiki group tended to decrease after treatment, while in the massage and control groups they tended to increase.8Journal of Pain and Symptom Management. The effects of Reiki and back massage on women’s pain and vital signs post-abdominal hysterectomy: A randomized controlled trial Another trial combined the two, applying a Japanese massage protocol (Anmá) followed by either rest or Reiki, finding that the combination of massage and Reiki together was tested against massage plus rest.9PubMed Central. Massage and Reiki used to reduce stress and anxiety: Randomized Clinical Trial
These are small studies with specific populations, so they do not prove Reiki is universally “better” than massage. What they do suggest is that the two are genuinely different interventions, not interchangeable relaxation techniques, and that Reiki can hold its own in head-to-head comparisons even though it involves no physical pressure.
What the Clinical Trials Show
The strongest evidence for Reiki clusters around pain and anxiety reduction, particularly in surgical and cancer patients. A systematic review and meta-analysis of Reiki in surgical care found moderate-to-low certainty evidence that perioperative Reiki significantly reduced postoperative pain at both 24 and 48 hours, as well as anxiety and blood pressure at 48 hours.10Intensive and Critical Care Nursing. The effectiveness of Reiki in surgical care: A systematic review and meta-analysis – Section: Results Subgroup analyses showed the strongest effects in female-only populations, in studies using at least two sessions, and in sessions lasting 30 minutes.
In cancer care, a randomized controlled trial found that patients receiving Reiki showed a significant decrease in pain and anxiety over time compared to progressive relaxation exercises, with Reiki proving more effective at reducing stress levels.11PubMed. The Effect of Reiki Applied to Cancer Patients on Pain, Anxiety, and Stress Levels: A Randomized Controlled Study An earlier study at a day oncology unit found that patients who completed four Reiki sessions saw their average anxiety score drop from about 6.8 to about 2.3 on a visual analog scale, with improvements in overall well-being, relaxation, and sleep quality.12PubMed. The effects of Reiki therapy on pain and anxiety in patients attending a day oncology and infusion services unit An outpatient Reiki program at two university hospitals reported clinically significant improvements in pain, fatigue, anxiety, nausea, and well-being among patients receiving infusion treatments.3Journal of Pain and Symptom Management. Evaluation of an Outpatient Reiki Program for Cancer and Other Chronic Illnesses Receiving Infusion Treatments at Two University Hospitals
An earlier literature review that calculated effect sizes across randomized trials found large effect sizes for reduced pain medication use in post-surgical patients, with the Reiki group taking significantly less medication at multiple time points after hysterectomy compared to usual care.13PubMed Central. Effect of Reiki Therapy on Pain and Anxiety in Adults: An In-Depth Literature Review of Randomized Trials with Effect Size Calculations – Section: Results
One area where the evidence is weaker involves objective physiological measures like heart rhythm. A randomized placebo-controlled trial of cardiac patients found no significant differences between Reiki, sham Reiki, and control groups on ECG parameters such as PR and RR intervals.14European Journal of Cardiovascular Nursing. Is Reiki effective in reducing heart rhythm, cortisol levels, and anxiety and improving biochemical parameters in individuals with cardiac disease? Randomized placebo-controlled trial – Section: Results However, an earlier study in healthcare professionals with burnout found that heart rate variability markers shifted toward parasympathetic (rest-and-digest) dominance after Reiki compared to placebo, and body temperature rose slightly.15PubMed. Immediate effects of reiki on heart rate variability, cortisol levels, and body temperature in health care professionals with burnout The picture is mixed: subjective outcomes like pain and anxiety show consistent improvement, while hard physiological endpoints are less clearly affected.
The Placebo Question
The biggest challenge in Reiki research is separating the effect of Reiki itself from the effect of simply lying quietly while someone stands over you with caring intent. Researchers use sham Reiki as a placebo control: an untrained person mimics the hand positions and procedures of a real Reiki practitioner. The idea is that if patients cannot tell the difference, any improvement in the sham group reflects placebo or contextual effects rather than the energy transfer Reiki claims to deliver.16PubMed Central. Reiki Is Better Than Placebo and Has Broad Potential as a Complementary Health Therapy – Section: Methods
A recent analysis of sham Reiki protocols across 35 studies found that in the majority of cases, the sham practitioner mimicked everything except having received Reiki training. About a third of these studies showed significant improvements in the sham group, confirming a real placebo effect. Interestingly, when the sham protocol differed more substantially from the Reiki protocol, placebo effects were rarely observed. And in the small number of studies where the sham practitioner had some connection to Reiki (perhaps having observed sessions or having personal interest), only one showed a placebo effect.17PubMed. Investigation and assessment of sham Reiki protocols in Reiki research – Section: RESULTS
What does this mean practically? It means Reiki likely produces benefits beyond doing nothing at all, but some of those benefits overlap with what you would get from any quiet, attentive, hands-on ritual. The cortisol findings illustrate this well. In the cardiac disease trial, the control group (who received no intervention at all) saw cortisol rise significantly, while both the Reiki and sham Reiki groups maintained stable cortisol levels. In other words, both real and fake Reiki prevented the stress response that comes with just sitting in a hospital, but neither was clearly better than the other at lowering cortisol.18European Journal of Cardiovascular Nursing. Is Reiki effective in reducing heart rhythm, cortisol levels, and anxiety and improving biochemical parameters in individuals with cardiac disease? Randomized placebo-controlled trial – Section: Results Whether you think this makes Reiki “real” or “just relaxation” depends on what you consider the active ingredient to be.
What Patients Actually Feel
Whatever the mechanism, the subjective experience of receiving Reiki is remarkably consistent across studies. A qualitative analysis of patient reports identified eight recurring themes. Deep relaxation and calm was the most common, reported by about two-thirds of recipients. Just over half described body sensations like warmth, tingling, or a feeling of heaviness. About a third reported emotional shifts, and smaller but notable proportions described spiritual or symbolic experiences, changes in symptoms, altered perception, sleepiness, and changes in breathing patterns.19PubMed. An Evaluation of the Subjective Experience of Receiving Reiki: Qualitative Results from a Pragmatic Effectiveness Study
Women with cancer who received Reiki described a release of emotional strain, inner peace, and a temporary mental clearing from thoughts about their illness, along with physical sensations like pain relief and tingling.20PubMed. An exploratory study of reiki experiences in women who have cancer In a very different population, older adults with HIV/AIDS who learned Reiki as part of a supported-residence program reported improved coping with addictions, better engagement in counseling, and improvements in daily living skills.21PubMed Central. Qualitative Assessment of the Impact of Implementing Reiki Training in a Supported Residence for People Older Than 50 Years with HIV/AIDS – Section: Results These are self-reported outcomes and cannot prove a physiological mechanism, but they illustrate why people keep coming back for sessions even when the science remains unsettled.
Safety Profile
One of Reiki’s strongest selling points is that it carries essentially no physical risk. Because there is no tissue manipulation and often no physical contact, there is nothing to injure. Reiki has been tested even in extremely vulnerable populations. A pilot study in newborns at risk for neonatal abstinence syndrome (the withdrawal symptoms babies experience when born to mothers who used opioids during pregnancy) found the therapy was safe and feasible to administer in a neonatal intensive care unit.22PubMed Central. Safety of Reiki Therapy for Newborns at Risk for Neonatal Abstinence Syndrome A trial in preterm infants undergoing orogastric tube insertion found that those receiving Reiki had better physiological stability and lower stress and pain scores after the procedure compared to controls.23PubMed. Efficacy of facilitated tucking position and Reiki given to preterm infants during orogastric tube insertion: A randomised controlled trial
The only real risk with Reiki is an indirect one: if someone uses it as a replacement for proven medical treatment. No credible Reiki practitioner or research institution recommends Reiki as a substitute for conventional medicine. It is positioned as a complementary therapy, something used alongside standard treatment to help manage symptoms and improve quality of life.
Reiki in Hospitals
Reiki has moved well beyond wellness spas. It is offered in a growing number of hospital systems, particularly in oncology, palliative care, and surgical recovery settings. The two-university-hospital outpatient program mentioned earlier is a representative example: Reiki was delivered during infusion treatments to patients with cancer and other chronic illnesses, and participants reported clinically significant improvements across all measured symptoms.3Journal of Pain and Symptom Management. Evaluation of an Outpatient Reiki Program for Cancer and Other Chronic Illnesses Receiving Infusion Treatments at Two University Hospitals In palliative care settings, Reiki has been incorporated into broader integrative medicine programs alongside aromatherapy and massage, with patients rating improvements in pain, anxiety, and overall comfort before and after sessions.24PubMed Central. Reiki and Therapeutic Touch for symptom burden and quality of life in palliative settings: A systematic review – Section: Results
There is a cost argument too. One analysis of an integrative medicine program at a hospital (which included Reiki along with other therapies like acupuncture and guided imagery) found that patients receiving these therapies saw pain drop by an average of about 2 points, and this reduction was associated with a cost savings of roughly $900 per hospital admission, primarily through reduced need for pharmaceutical pain management.25PubMed Central. Cost Savings from Reducing Pain Through the Delivery of Integrative Medicine Program to Hospitalized Patients – Section: RESULTS That figure reflects a bundle of integrative therapies rather than Reiki alone, but it illustrates why hospital administrators have been receptive to adding these services.
Distance Reiki
One of the more controversial aspects of Reiki is the claim that it can be performed at a distance, with the practitioner and recipient in entirely different locations. Level II Reiki training includes a distance-healing symbol, and many practitioners offer remote sessions by phone or video. If you find the basic premise of hands-on energy healing hard to accept, distance Reiki will likely stretch credibility further.
A study during the COVID-19 pandemic evaluated a distance Reiki program for frontline healthcare workers and found significant decreases in self-reported stress, anxiety, and pain, along with improvements in well-being and sleep quality.26PubMed Central. Evaluation of a Distance Reiki Program for Frontline Healthcare Workers’ Health-Related Quality of Life During the COVID-19 Pandemic The obvious limitation is that this study lacked a sham control. Healthcare workers who signed up for a distance Reiki program during a pandemic were self-selected, highly stressed, and expecting benefit. The improvements may reflect the relaxation of setting aside time for self-care, the psychological comfort of feeling cared for, or a placebo response, rather than anything transmitted across space. Distance Reiki remains the least evidence-supported branch of the practice.
Reiki, Therapeutic Touch, and Healing Touch
Reiki is not the only therapy based on the idea of manipulating a human energy field. Therapeutic Touch and Healing Touch are closely related practices, and the three are sometimes grouped under the umbrella term “biofield therapies.”27Comprehensive Integrative Oncology. Healing touch, therapeutic touch, and reiki in integrative oncology All three share the premise that a practitioner can influence a patient’s energy field to promote healing. The practical differences lie in training pathways, hand positions, and philosophical framing: Therapeutic Touch was developed within the nursing profession and tends toward a more secular presentation, while Reiki retains its Japanese spiritual roots with attunements and symbols.
From a patient’s perspective, the experience of all three is broadly similar. You lie on a table, someone moves their hands around your body, and you may feel warmth, tingling, or deep relaxation. The research base is largest for Reiki, partly because it has the most widespread practitioner community, but the clinical findings across all three therapies are in the same general range of modest improvements in pain, anxiety, and quality of life.
Reiki for Children and Infants
Pediatric applications of Reiki are a small but growing area of research. A study of hospitalized children ages one to five receiving palliative care found medium-to-large clinical effect sizes for quality of life and stress, even though the differences did not reach statistical significance in the small sample. The children showed visible signs of relaxation, transitioning from active wakefulness before sessions to quiet sleep afterward.28Journal of Pain and Symptom Management. Reiki Therapy for Young Hospitalized Children Ages 1-5 Years Receiving Palliative Care – Section: Results The preterm infant study mentioned earlier found that Reiki reduced pain and stress scores after a painful procedure, with infants recovering physiological stability faster than those in the control group.23PubMed. Efficacy of facilitated tucking position and Reiki given to preterm infants during orogastric tube insertion: A randomised controlled trial
Pediatric studies are worth highlighting because they partly sidestep the placebo objection. A one-year-old or a preterm infant has no expectations about Reiki and cannot generate a psychological placebo response in the way an adult might. If these children are genuinely more relaxed after sessions, something is happening, even if that something turns out to be as simple as the calming presence of a quiet person with warm hands standing near the crib. The question of whether you call that “energy healing” or “the therapeutic power of human presence” may matter less than whether it helps.