Is Reiki Dangerous? Safety, Risks and Limits

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The available evidence indicates that Reiki is safe and non-invasive. The NCCIH, part of the US National Institutes of Health, states that it has not been shown to have harmful effects. There are no substances, no manipulation of the body, no needles.

The real risk is not in the technique. It is in how it gets used. And that deserves a serious conversation.

Why the technique itself carries little risk

A Reiki session means lying down, fully clothed, on a treatment table while the practitioner places their hands on the body or a few centimetres above it.

Nothing is administered. Nothing is swallowed. No joints are manipulated, no pressure is applied, no posture is corrected. No clothing is removed. There is no contact with intimate areas.

That leaves very little room for direct physical harm, which is why even the most critical reviews agree on the safety point. You can read it at the source: nccih.nih.gov/health/reiki.

Two honest caveats belong here.

First, some people find physical contact uncomfortable, whether from personal history or sensitivity. That is solved by working entirely off the body, hands at a distance, agreed in advance. The practitioner should ask you — you should not have to request it.

Second, an hour of stillness sometimes brings emotion to the surface. Tears may come, or a memory, or accumulated exhaustion. It is not dangerous, but it can catch you off guard. A practitioner working well holds that calmly and without dramatising it.

The real risk: what can actually harm you

Here is the important half of this article, and I will give it more room than the first, because this is where health is genuinely lost.

Harm does not come from a hand resting on a shoulder. It comes from the decisions made around it.

1. Delaying a diagnosis

This is risk number one, by a wide margin.

Someone has a symptom that worries them: pain that will not settle, a lump, bleeding, a shift in mood that does not lift. Instead of seeing a doctor, they try a few weeks of complementary therapy first, "to see if it passes".

Those weeks can be expensive. There are conditions where time is exactly the factor that determines the outcome.

My rule in practice is simple and not negotiable: Reiki never comes before a diagnosis. If you tell me about a symptom that has not been assessed, my answer will be to see a doctor. You can still come if you want — but you see the doctor.

2. Stopping or reducing a treatment

The second risk is dropping something that was working.

It happens when someone starts feeling better and attributes it to the complementary therapy. They skip a dose, then another. With psychiatric medication, anticoagulants, blood pressure drugs or cancer treatment, this can be serious.

No Reiki practitioner has any standing to comment on your medication. None. Nor do I. If you ever hear a practitioner say "you could start reducing that", the person is operating well outside any legitimate limit.

If you want to adjust something, you talk to whoever prescribed it.

3. Practitioners who promise cures

A promise of cure is the single most reliable red flag in this field.

Nobody can promise you that Reiki will remove an illness, because the evidence does not support it and because nobody knows how your body will respond. Anyone promising it is either deceiving themselves or deceiving you, and for you the outcome is the same either way.

Watch for the softer versions too: "this clears up in three sessions", "I have healed worse cases", "if you are not improving it is because you are resisting".

That last one deserves its own paragraph. When a practitioner makes you responsible for not improving, they have placed you in an impossible position: if it works it is their doing, and if it does not it is your fault. Leave.

4. Sustained spending without benefit

There is a less dramatic but very real harm: paying month after month for something giving you nothing, because you were told "the process takes a long time".

Honest accompaniment gets reviewed. After a few weeks it makes sense to ask whether you are sleeping better, whether you reach the end of the day less tense, whether you notice anything you can name. If the answer is no, the right move is to say so, not to sell another package.

5. Dependency and covert diagnosis

A practitioner should not "read" illnesses in you. When someone tells you they see a blockage in your liver or damaged energy in your womb, that is a pseudo-diagnosis, and it produces fear, expense and — once again — delay.

Nor should a practitioner become the only person you consult about life decisions. Serious accompaniment returns you to your own autonomy; it does not install you in the treatment room.

There is a risk almost nobody mentions: what you say on the table.

In an hour of calm, people say things they have told no one. A recent diagnosis, a separation, a fear. That deserves the same confidentiality as any consultation.

A practitioner who discusses other people's cases with you will discuss yours with someone else. And being asked for photos, recordings or testimonials to publish without your explicit consent is not acceptable either.

Red flags and good practice

Red flag	Good practice
Promises to cure an illness or diagnosis	Talks about accompaniment, calm and wellbeing
Suggests stopping or reducing medication	Insists you continue your treatment
"Diagnoses" organs or ailments with the hands	Does not diagnose and refers you to a doctor
Blames you if you do not improve	Accepts that sometimes nothing is felt
Sells long packages upfront with no review	Reviews with you whether continuing makes sense
Discourages conventional medicine	Treats it as the priority and stays a complement
Pressures you to bring your family	Respects your pace and your free will
Does not explain what will happen	Explains first, asks about touch, seeks consent

How to protect yourself

Three questions before booking with anyone, including me.

What do you expect this to achieve? If the answer mentions curing something, you already have the information you needed.

What happens to my medical treatment? The only acceptable answer is that it continues unchanged and that you speak with your treating professional.

What do you do if I mention a new symptom? The only acceptable answer is that you get referred.

And a quieter fourth test: notice whether the person lets you go. A healthy space does not hold on to you.

One note on the framework: in Colombia, complementary and alternative medicines have a recognised place within the health system, but that does not mean every practice is regulated or every practitioner authorised. A certificate on a wall is not a health authorisation. I cover this in the article on the legal framework.

Situations that call for more caution

Reiki has no contraindications in the pharmacological sense, but there are contexts where judgement matters.

If you are in an acute emotional crisis, or if thoughts of harming yourself appear, this is not what you need right now. What you need is professional support, and I warmly encourage you to seek it today — through emergency services, your health provider, or a mental health line in your city.

If there is cancer treatment, a pregnancy or upcoming surgery, Reiki can accompany, always coordinated with your medical team and replacing nothing. I write about that in Reiki and medical procedures.

If you are under psychiatric care, the practice is compatible, but your professional should know about it.

What I do in my practice

Before a first session I ask three things: whether you are being treated for anything, whether there is a symptom you have not taken to a doctor, and whether you are comfortable with physical contact.

If an unassessed symptom comes up, the conversation changes direction. It has happened several times in Medellín, with people who had spent months postponing an appointment because they were afraid of what might be found. Someone getting off that table and calling a doctor strikes me as a better outcome than any sense of wellbeing.

I promise nothing. I do not require packages. And if after a few sessions you notice nothing you can name, I will say so before you have to.

In Santa Elena — the cloud-forest village above Medellín where I also work — many people come to disconnect from the city. The rule up there is the same: this accompanies, it does not replace.

To keep reading: the available evidence, contraindications in detail, how to choose a practitioner and what the law says in Colombia.

Frequently asked questions

Does Reiki have side effects? No harmful effects have been documented. Some people describe drowsiness, thirst or deep calm afterwards; others notice nothing. Emotion sometimes surfaces during the stillness. None of that is an adverse effect in the clinical sense, but a practitioner should explain it beforehand rather than announce it as inevitable.

Can Reiki make an illness worse? The technique itself does not act on the course of a disease, for better or worse. What can worsen a condition is using Reiki to postpone a medical consultation or to justify stopping treatment. The harm comes from the decision, not from the hands.

Is it safe for children, pregnant women or older adults? It is non-invasive and generally considered safe for those groups, always as a complement and with the treating professional's knowledge. In pregnancy and paediatrics it must not replace check-ups or treatment, and the session should be adapted in length and position.

What is a "healing crisis" and should I worry? It is a term some practitioners use to explain discomfort after a session. It has no scientific backing and, announced in advance, it can induce the very symptom described. If you feel significantly or persistently unwell after a session, do not read it as part of the process: see a doctor.

What if a practitioner tells me to stop my medication? Do not do it, and do not go back. No Reiki practitioner has any standing to intervene in a prescription. Talk to whoever prescribed it. That advice is by far the most dangerous behaviour you can encounter in this field.

Disclaimer

This article is for educational purposes and does not replace diagnosis, treatment or follow-up by a healthcare professional. Reiki is a complementary practice: it accompanies, it does not substitute. If you are under medical or psychological care, continue it and talk to your treating professional before adding any complementary therapy.

If you are unsure whether this fits your situation, write to me on WhatsApp at +57 314 811 7561 and we can talk it through before you book anything. Asking commits you to nothing.