Laughter Therapy

Laughter therapy is the deliberate use of laughter — often laughter you start on purpose, whether or not anything is funny — as a simple, low-cost way to lift mood and ease stress. It comes in a few flavors: laughter yoga, a group practice that pairs playful laughing exercises with slow breathing; humor therapy, which uses jokes, comedy, and funny material; and hospital clown or humor programs that bring lightness to patients and families. The idea that ties them together is surprising but well supported: your body seems to respond to laughter you fake much the way it responds to laughter that bubbles up on its own. This page explains what laughter therapy actually is, what happens in your body during a good laugh, and — honestly — what the research does and does not show. The short version: it is safe, free, and genuinely pleasant, with real but modest evidence that it can ease anxiety, low mood, and stress. It is a lovely add-on to a healthy life, not a cure for any disease, and this page is careful to keep those two things separate.

Table of Contents

  1. What Laughter Therapy Is
  2. Laughter Yoga, Humor Therapy & Clown Programs
  3. The Physiology of a Laugh
  4. What the Evidence Actually Shows
  5. Overhyped Claims & the Norman Cousins Story
  6. Where It Has Been Studied
  7. How to Try It Yourself
  8. Is It Safe? Who Should Be Careful
  9. The Honest Bottom Line
  10. Research Papers
  11. Connections
  12. Featured Videos

What Laughter Therapy Is

Laughter therapy is any structured practice that uses laughter on purpose to help people feel better. The word "therapy" here is gentle — it does not mean a medical treatment that replaces care from a doctor. It means a technique, usually done in groups, designed to get you laughing regularly so you can enjoy the mood lift and stress relief that laughter brings.

The most eyebrow-raising part is that the laughter does not have to be "real." You do not need a comedian or a funny situation. In a laughter-therapy session you might start by simply going through the motions — a forced "ha-ha-ha," a playful giggle, a pretend belly laugh. Almost always, within a minute or two, the fake laughing turns into the real thing, especially in a group where laughter is contagious. Practitioners call this voluntary or simulated laughter, and the core claim of the whole field is simple: the body appears to respond to voluntary laughter in much the same way it responds to spontaneous laughter. You breathe deeply, your muscles work and then relax, and your mood tends to lift — whether the laugh started as a joke or as an exercise.

That is the whole trick, and it is what makes laughter therapy so accessible. You do not need talent, money, or a good sense of humor. You just need willingness to be a little silly.

Laughter Yoga, Humor Therapy & Clown Programs

Laughter therapy is really an umbrella term covering a few related practices.

Laughter yoga

Laughter yoga is the best-known method, created in the mid-1990s by Dr. Madan Kataria, a physician in Mumbai, India. Despite the name, it is not a series of stretching poses. It combines deliberate laughter exercises — playful, childlike routines done as a group — with the slow, rhythmic breathing (pranayama) borrowed from yoga. A typical session cycles between bouts of intentional laughing and gentle deep-breathing breaks, often with clapping, chanting ("ho-ho, ha-ha-ha"), and eye contact that makes the laughter spread naturally. Laughter yoga is practiced worldwide in free community "laughter clubs," in senior centers, and in workplaces.

Humor therapy

Humor therapy takes the more familiar route: it uses actually funny material — comedy films, joke books, cartoons, funny stories, humor carts on hospital wards — to prompt genuine laughter and lighten a difficult mood. Instead of manufacturing laughter, it supplies the trigger.

Hospital clowns and humor programs

Many hospitals run therapeutic clown or humor programs, especially in children's wards and increasingly in elder care. Trained "clown doctors" (very different from birthday-party clowns) use gentle, improvised play to reduce fear before procedures and to give sick people a moment of ordinary joy. These programs focus as much on comfort and connection as on laughter itself.

All three share the same goal: to interrupt stress, worry, and isolation with a dose of playfulness.

The Physiology of a Laugh

A hearty laugh is a small, whole-body workout. Understanding what it does physically helps explain why it might make you feel better — and also keeps us honest about how big those effects really are.

When you laugh:

Researchers have proposed several downstream effects. Small studies suggest laughter may nudge down stress hormones such as cortisol (Berk and colleagues reported this in an early crossover study), lift mood by engaging the brain's reward and possibly endorphin systems, and support healthy blood-vessel tone (Miller and Fry described short-term improvements in vascular function after mirthful laughter). It is important to read these as proposed and short-term mechanisms measured in small groups — they are plausible and interesting, not proof that laughing changes long-term health. The clearest, most consistent thing laughter does is exactly what you would expect: it makes people feel good in the moment, and doing it regularly seems to help mood and stress over time.

What the Evidence Actually Shows

Here is the honest heart of the matter. Laughter therapy has been studied in a fair number of small randomized trials, and several teams have pooled those trials into systematic reviews and meta-analyses. The overall pattern is encouraging but modest.

Across the better reviews, laughter and humor interventions tend to produce small-to-moderate reductions in anxiety, depression, and perceived stress, along with improvements in mood, sleep quality, and general sense of wellbeing. A large meta-analysis by van der Wal and Kok found meaningful effects on depression and other outcomes; a nursing meta-analysis by Zhao and colleagues reported reduced depression and anxiety and better sleep; and reviews focused specifically on laughter yoga (for example, Bressington and colleagues) concluded that it is feasible, well-liked, and probably helpful for mental wellbeing. There are also weaker, less consistent signals for lower blood pressure and short-term changes in immune and quality-of-life measures.

But every serious review adds the same cautions, and they matter:

Put together, reviewers generally rate the evidence as positive but low-to-moderate certainty. In plain terms: it looks like a genuine, gentle help for mood and stress, and it is one of the safest interventions you could try — but the science is not strong enough to make big promises, and anyone who does is going beyond the data.

Overhyped Claims & the Norman Cousins Story

Because laughter feels powerful, it attracts oversized claims. It is worth naming the two biggest ones plainly.

Claim 1: "Laughter can cure serious disease." It cannot, and no reputable study shows this. Laughter therapy has never been demonstrated to shrink tumors, clear infections, reverse heart disease, or replace medication or surgery. Where it has been tested in people with cancer or kidney disease, the measured benefits are things like better mood, less anxiety, and improved quality of life — real and worthwhile, but not a treatment for the disease itself. Framing laughter as a cure is not only unsupported; it can be harmful if it nudges someone away from care that works.

Claim 2: "Norman Cousins laughed himself well." This is the famous origin story of the whole field. In 1976, the writer Norman Cousins published a widely read essay in the New England Journal of Medicine describing how, facing a painful connective-tissue illness, he checked into a hotel, took high-dose vitamin C, and watched Marx Brothers films and Candid Camera, reporting that ten minutes of belly laughter gave him hours of pain-free sleep. It is a moving, influential story — and it helped launch serious interest in mind-body medicine. But it is exactly one person's account of one recovery. A single anecdote, however inspiring, cannot tell us whether laughter caused the improvement, and it is not evidence that laughter treats disease. The right way to honor the Cousins story is the way researchers eventually did: by testing the idea in real trials — which is how we ended up with the modest, honest picture above.

Where It Has Been Studied

Laughter interventions have been tested in a range of everyday settings, which is part of why the research is so varied. Common ones include:

The through-line is that laughter therapy tends to be studied in people dealing with stress, isolation, or a hard stretch of life — and in those settings it seems to offer a genuine, if modest, boost.

How to Try It Yourself

The best thing about laughter therapy is that you can try it today, for free, with no equipment. A few practical routes:

There is no "prescription" to get right. Aim for regular, enjoyable laughter rather than a perfect technique. If a session leaves you lighter, you are doing it correctly.

Is It Safe? Who Should Be Careful

For the vast majority of people, laughter therapy is extremely safe, free, and pleasant — one of the lowest-risk things in this entire library. It has no side effects for most people beyond a sore belly and a better afternoon.

That said, a hard, sustained laugh is physically vigorous. It briefly raises pressure inside the chest and abdomen and speeds up the heart, so a little common-sense caution is warranted for some people. Talk with your doctor before doing vigorous or prolonged laughter exercises if you have:

None of these mean you cannot enjoy laughter — they simply mean you should ease in gently and check with a clinician before doing intense, repeated laughter drills. If a session ever makes you dizzy, breathless, or lightheaded, stop and rest. For nearly everyone else, the only real risk is having a good time.

The Honest Bottom Line

Laughter therapy is a safe, free, genuinely mood-lifting practice with modest but real evidence behind it. The research — a collection of small, short, imperfect but broadly consistent trials — suggests it can ease anxiety, low mood, and stress and improve quality of life, with weaker hints toward blood pressure and short-term immune measures. That is a nice thing to be true, and it is enough reason to laugh more on purpose.

What it is not: a treatment for any disease. Nobody should skip proven medical care, stop a medication, or delay seeing a doctor because they are laughing more. Think of laughter therapy the way you might think of a good walk, a warm friendship, or a full night's sleep — a real, worthwhile support for feeling better, and a wonderful adjunct to the things that actually treat illness. Used that way, it costs nothing, harms almost no one, and reliably delivers the one benefit it has always promised: a lighter, brighter moment. That is plenty.

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Research Papers

  1. van der Wal CN, Kok RN. Laughter-inducing therapies: Systematic review and meta-analysis. Social Science & Medicine. 2019;232:473–488. doi:10.1016/j.socscimed.2019.02.018 — large pooled analysis finding meaningful effects of laughter interventions on depression and related outcomes, while flagging study-quality limits.
  2. Zhao J, Yin H, Zhang G, Li G, et al. A meta-analysis of randomized controlled trials of laughter and humour interventions on depression, anxiety and sleep quality in adults. Journal of Advanced Nursing. 2019;75(11):2435–2448. doi:10.1111/jan.14000 — laughter/humor interventions reduced depression and anxiety and improved sleep quality across pooled trials.
  3. Bressington D, Yu C, Wong W, Ng TC, et al. The effects of group-based Laughter Yoga interventions on mental health in adults: A systematic review. Journal of Psychiatric and Mental Health Nursing. 2018;25(8):517–527. doi:10.1111/jpm.12491 — laughter yoga appears feasible, acceptable, and potentially beneficial for mental wellbeing, but trials are small and methodologically weak.
  4. Mora-Ripoll R. Potential health benefits of simulated laughter: A narrative review of the literature and recommendations for future research. Complementary Therapies in Medicine. 2011;19(3):170–177. doi:10.1016/j.ctim.2011.05.003 — reviews the case that voluntary (simulated) laughter can yield benefits similar to spontaneous laughter, and calls for stronger studies.
  5. Shahidi M, Mojtahed A, Modabbernia A, Mojtahed M, et al. Laughter yoga versus group exercise program in elderly depressed women: a randomized controlled trial. International Journal of Geriatric Psychiatry. 2011;26(3):322–327. doi:10.1002/gps.2545 — laughter yoga reduced depression at least as much as an exercise program and improved life satisfaction.
  6. Ko HJ, Youn CH. Effects of laughter therapy on depression, cognition and sleep among the community-dwelling elderly. Geriatrics & Gerontology International. 2011;11(3):267–274. doi:10.1111/j.1447-0594.2010.00680.x — laughter therapy improved depression and sleep quality in older community members.
  7. Morishima T, Miyashiro I, Inoue N, Kitasaka M, et al. Effects of laughter therapy on quality of life in patients with cancer: An open-label, randomized controlled trial. PLOS ONE. 2019;14(6):e0219065. doi:10.1371/journal.pone.0219065 — a laughter program modestly improved quality-of-life measures in cancer patients over the short term.
  8. Kim SH, Kim YH, Kim HJ. Laughter and Stress Relief in Cancer Patients: A Pilot Study. Evidence-Based Complementary and Alternative Medicine. 2015;2015:864739. doi:10.1155/2015/864739 — small pilot suggesting a laughter intervention reduced stress and anxiety during cancer care.
  9. Kuru N, Kublay G. The effect of laughter therapy on the quality of life of nursing home residents. Journal of Clinical Nursing. 2017;26(21–22):3354–3362. doi:10.1111/jocn.13687 — randomized study reporting improved quality of life and reduced loneliness among nursing-home residents.
  10. Berk LS, Tan SA, Fry WF, Napier BJ, et al. Neuroendocrine and stress hormone changes during mirthful laughter. The American Journal of the Medical Sciences. 1989;298(6):390–396. doi:10.1097/00000441-198912000-00006 — early small crossover study reporting reductions in cortisol and other stress hormones with mirthful laughter.
  11. Miller M, Fry WF. The effect of mirthful laughter on the human cardiovascular system. Medical Hypotheses. 2009;73(5):636–639. doi:10.1016/j.mehy.2009.02.044 — reviews short-term improvements in blood-vessel function observed after mirthful laughter; hypothesis-generating, not proof of lasting benefit.
  12. Cousins N. Anatomy of an Illness (as Perceived by the Patient). New England Journal of Medicine. 1976;295(26):1458–1463. doi:10.1056/NEJM197612232952605 — the influential first-person essay that popularized laughter and mind-body medicine; important historically, but a single case, not clinical evidence.

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Connections

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