Cupping Therapy

Cupping is an old, simple therapy: a practitioner places round cups on the skin and creates suction inside them, so the skin and the tissue just beneath it get gently pulled up into the cup. It has deep roots in Traditional Chinese Medicine, in the Middle Eastern practice known as hijama, and in folk medicine across Europe and Asia. In the last decade it also became popular with athletes, and the round purple marks it leaves have shown up on Olympic swimmers and on social media. This page explains, in plain language, what cupping actually is, the difference between "dry" cupping and "wet" cupping (hijama), what the suction really does to your body, and — most importantly — what the honest evidence says. The short version: cupping is studied mostly for muscle and joint pain, where a few reviews hint at modest short-term relief, but those studies are small and hard to trust, so the evidence is weak. The famous circular marks are ordinary bruises, not "toxins" being pulled out. And while dry cupping is fairly low-risk, wet cupping breaks the skin and needs real hygiene. Read on for the details, honestly told.

What Cupping Therapy Is
The Main Types: Dry, Wet, Fire, and Pump
The Traditional Idea Behind It
What Actually Happens Under the Cup
The Honest Evidence: Mostly About Pain
The Marks Are Bruises, Not "Toxins"
Athletes, the Olympics, and the Popularity Boom
Safety: Dry Cupping vs Wet Cupping (Hijama)
Who Should Be Careful or Skip It
The Honest Bottom Line
Research Papers
Connections
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What Cupping Therapy Is

At its core, cupping is suction applied to the skin. A practitioner takes a round cup — traditionally glass or bamboo, now often silicone or plastic — and removes some of the air inside it so a partial vacuum forms. When the cup is set on the body, that vacuum pulls the skin and the shallow tissue underneath upward into the cup. The cups are usually left in place for a few minutes, or slid across oiled skin ("moving cupping," a bit like a reverse massage).

The most common places for cupping are the back, shoulders, and neck, where there is enough muscle for the skin to lift comfortably. A typical session uses several cups at once and lasts anywhere from a few minutes to about fifteen. When the cups come off, you are usually left with round, coin-sized marks that can range from pink to deep purple. Those marks are the single most recognizable feature of cupping, and they are a big source of confusion — we will come back to what they really are.

The Main Types: Dry, Wet, Fire, and Pump

"Cupping" is really an umbrella term for a few related methods. It helps to separate them, because they carry very different levels of risk.

Dry cupping is suction alone. The skin is never broken. This is the version most people picture, and it is the lower-risk kind. The worst you usually get is temporary bruising and soreness.

Wet cupping — often called hijama in the Middle Eastern and Islamic tradition — is different in an important way. The practitioner first applies suction, then makes small, shallow cuts or pinpricks in the skin, then reapplies the cup so that a small amount of blood is drawn out into it. Because wet cupping deliberately breaks the skin and handles blood, it carries real infection and bloodborne-disease risks that dry cupping does not. That distinction matters a great deal and is covered in the safety section below.

There are also two ways the suction itself is created:

Fire cupping is the traditional method. The practitioner briefly holds a flame inside the cup to heat the air, then quickly places the cup on the skin. As the trapped air cools, it contracts and creates the vacuum. The flame never touches you — but because there is an open flame and a hot cup, there is a small risk of burns.
Pump (or suction) cupping uses a hand pump or a squeezable silicone cup to remove the air mechanically. There is no fire, so no burn risk, and it is easier to control the amount of suction. Many modern practitioners and at-home kits use this method.

So a real-world session might be, for example, "dry fire cupping on the upper back" or "wet cupping with a pump." Keeping these words straight helps you understand both the tradition and the risks.

The Traditional Idea Behind It

In Traditional Chinese Medicine, cupping is explained through the ideas of qi (a kind of vital energy) and blood "stagnation." In this framework, health depends on qi and blood flowing smoothly through channels in the body, and pain or illness is thought to come from that flow getting stuck. Cupping is said to draw the stagnation to the surface, break it up, and get things moving again. In the hijama tradition, wet cupping is often described as removing "bad" or stagnant blood.

It is worth presenting these ideas plainly as tradition: they are the historical and cultural explanation for why cupping was done, passed down for many centuries across China, the Middle East, Egypt, and Europe. They are not, however, descriptions that map onto modern anatomy and physiology. "Qi" and "stagnation" are concepts within a traditional system, not things that have been measured in a lab. You can respect the long history of a practice while being honest that its original explanation is not how we understand the body today. The next section describes what the suction is actually doing.

What Actually Happens Under the Cup

Mechanically, the story is straightforward. The vacuum inside the cup creates negative pressure, which pulls the skin and the loose tissue beneath it up and outward. That stretching does a few measurable things:

It ruptures tiny surface blood vessels. The pulling force is strong enough to break small capillaries near the surface, letting a little blood leak into the surrounding tissue. That leaked blood is exactly what produces the round marks — in other words, a bruise.
It increases local blood flow. Studies that measure skin blood flow find it rises in and around the treated area for a while after the cups come off. More blood briefly reaches the spot.
It stretches skin, fascia, and muscle. The mechanical pull on connective tissue and the stimulation of nerve endings in the skin may influence how the nervous system processes pain in that region — a plausible reason some people report feeling looser or less sore afterward.

None of this involves pulling anything out of the body (in dry cupping, nothing leaves at all — the skin is intact). What cupping does is create a localized bruise plus a temporary bump in circulation and a strong sensory input. Whether those effects add up to meaningful, lasting pain relief is the real question, and it is where the evidence gets shaky.

The Honest Evidence: Mostly About Pain

Almost all of the serious research on cupping is about pain — neck pain, low-back pain, and other muscle-and-joint complaints. That is the fair place to judge it, and where honest claims can be made. Cupping has also been marketed for everything from high blood pressure to fertility to "detox," but the evidence there ranges from thin to nonexistent, so this page focuses on pain.

Here is what the better reviews find. Several systematic reviews and meta-analyses report that cupping can produce modest short-term reductions in pain compared with no treatment, especially for chronic neck and low-back pain. So there is a signal, and it points in a positive direction. But almost every one of those same reviews adds a large caveat, and the caveats are what matter:

The studies are small. Many trials enroll only a few dozen people, which makes their results unreliable and easy to overstate.
They are very hard to blind. A drug trial can give one group a placebo pill that looks identical to the real one. Cupping is nearly impossible to fake convincingly — a person knows whether cups were suctioned onto their back, and they can see the marks afterward. That means a lot of the reported benefit could be the placebo effect, expectation, and the attention of a caring practitioner rather than the suction itself. "Sham cupping" controls exist, but they are imperfect.
The risk of bias is high. Reviewers repeatedly rate the underlying trials as low quality, with problems in how patients were assigned to groups, how outcomes were measured, and how results were reported. Much of the research also comes from a small number of settings, which limits how far the findings generalize.

Put together, the honest summary is: cupping may offer modest, short-term relief for some kinds of muscle pain, but the evidence is weak and uncertain. It is not a proven treatment, and it is not a substitute for the things that have stronger support for back and neck pain — staying active, exercise and physical therapy, and, when needed, appropriate medical care. Reviewers almost uniformly call for larger, better-designed trials before anyone can say cupping clearly works. That is not a dismissal; it is just where the science honestly stands.

The Marks Are Bruises, Not "Toxins"

This is the most important myth to clear up. A very common claim — especially online — is that the dark circular marks show "toxins" being drawn out of the body, and that darker marks mean a "sicker" area. That is not true.

The marks are bruises. In medical terms they are areas of extravasated blood: the suction breaks small capillaries, blood leaks into the surrounding tissue, and that pooled blood shows through the skin as a red-to-purple circle. Over the following days it fades through the same yellow-green colors as any bruise, as the body reabsorbs the blood — because that is exactly what it is. In dry cupping the skin is never opened, so nothing is being removed from the body at all. The color mostly reflects how easily your particular capillaries broke and how much blood leaked, not the presence of any "toxin" or the health of the tissue underneath.

The body already has hard-working organs for handling waste products — chiefly the liver and kidneys. A suction cup on the skin does not perform that job, and there is no measured "toxin" that cupping removes. It is fine to enjoy cupping if it helps you feel better, but the "drawing out toxins" explanation is marketing, not physiology. Being clear-eyed about this also helps you spot exaggerated claims from a practitioner who leans on it.

Athletes, the Olympics, and the Popularity Boom

Cupping got a huge visibility boost when Olympic athletes, including high-profile swimmers, appeared with the telltale round marks on their shoulders and backs. Many athletes say cupping helps them recover, loosen tight muscles, and feel ready to compete, and plenty of trainers offer it.

It is worth being honest about what that does and does not prove. Elite athletes trying a therapy and liking it is a testimonial, not evidence. Top performers use many recovery methods at once, they are highly motivated to feel prepared, and the placebo and expectation effects are strong in exactly that setting. Reviews that looked specifically at cupping in athletes concluded that the studies were few and of low quality, and that firm conclusions were not possible. In other words, the Olympic marks made cupping famous, but they did not make it proven. If cupping helps an athlete feel looser and it is done safely, there is no harm in that — just don't mistake celebrity use for scientific proof.

Safety: Dry Cupping vs Wet Cupping (Hijama)

Honestly assessed, safety depends almost entirely on which kind of cupping you get.

Dry cupping is generally low-risk. For most healthy people the main effects are cosmetic and temporary: round bruise-marks that last several days to a week or two, some soreness, and occasionally small skin blisters where the suction was strong. With fire cupping there is an added, small risk of accidental burns from the flame or the heated cup, so a careful practitioner matters. These downsides are real but usually minor.

Wet cupping (hijama) is a different level of risk, because it breaks the skin. Any time skin is cut and blood is handled, there is a genuine possibility of:

Skin and soft-tissue infection if instruments, cups, or the skin are not properly sterilized.
Bloodborne infection — blades and cups that contact blood must be single-use or fully sterilized between people; sharing or reusing them can transmit serious infections.
Scarring or slow-healing wounds, particularly in people who heal poorly.

Because of this, wet cupping should only be done by a trained practitioner in a clean, professional setting that uses sterile, single-use blades, disposes of sharps and blood safely, and follows proper hygiene — the same standards you would expect from any procedure that draws blood. This is not something to improvise at home. Reported cupping complications in the medical literature are uncommon but do happen, and they cluster around burns (fire cupping) and infection (wet cupping) — the two avoidable, technique-related risks.

Who Should Be Careful or Skip It

Even though dry cupping is fairly gentle, it is not for everyone or every spot on the body. Use extra caution, or avoid it, in these situations:

Broken, inflamed, sunburned, or infected skin, or over open wounds, rashes, ulcers, or active eczema/psoriasis flares — suction over damaged skin can make things worse.
Bleeding disorders or blood-thinning medication. If you have a condition like hemophilia, or you take anticoagulants such as warfarin or a DOAC, or even regular aspirin, the bruising can be much more pronounced. Wet cupping, which draws blood on purpose, is especially risky here and generally should be avoided.
Pregnancy. Cupping over the abdomen and lower back is generally avoided during pregnancy; anyone pregnant should check with their own clinician before trying it.
Fragile or thin skin, including in older adults or people on long-term steroids, where the suction can tear or blister skin more easily.
Directly over varicose veins, moles, large blood vessels, or areas of poor circulation.
Children and the very frail should only be treated, if at all, by an experienced practitioner using gentle suction.

A good practitioner will ask about your health conditions and medications before starting, and will avoid these situations. If a provider doesn't ask, that is a reason to pause. And because cupping is a complement — not a replacement — for medical care, tell your doctor if you are using it for a persistent problem like back pain, so nothing that needs real treatment gets missed.

The Honest Bottom Line

Here is the fair summary, without the hype:

It may help a little, short-term, for muscle pain. Used as an add-on for chronic neck or low-back pain, cupping might give some people modest, temporary relief. If you find it relaxing and it seems to help, and it is done safely, there is little harm in dry cupping.
The evidence is weak. The studies are small, hard to blind, and at high risk of bias, so no one can honestly promise it works. It is not a cure and not a substitute for exercise, movement, physical therapy, and proper medical care.
Ignore the "detox" claims. The marks are bruises, not toxins. Nobody is pulling poisons out of you, and darker marks don't mean a sicker body.
Mind the hygiene, especially for wet cupping. Dry cupping is low-risk. Wet cupping (hijama) breaks the skin and must be done in a clean, professional setting with sterile, single-use equipment. When in doubt, choose dry cupping.
Know when to skip it. Broken or inflamed skin, bleeding disorders or blood thinners, and pregnancy (over certain areas) are all reasons to be cautious or avoid it, and to ask a clinician first.

Cupping is an ancient, culturally rich practice that many people genuinely enjoy. Approach it as a possible comfort measure for sore muscles — not as proven medicine — keep your expectations realistic, prioritize hygiene, and you can make a sensible, honest decision about whether it belongs in your routine.

Research Papers

Cao H, Li X, Liu J. An Updated Review of the Efficacy of Cupping Therapy. PLoS ONE. 2012;7(2):e31793. doi:10.1371/journal.pone.0031793 — Broad review of cupping trials; found possible benefits for some conditions but flagged the generally low quality of the evidence.
Kim JI, Lee MS, Lee DH, Boddy K, Ernst E. Cupping for Treating Pain: A Systematic Review. Evidence-Based Complementary and Alternative Medicine. 2011;2011:467014. doi:10.1093/ecam/nep035 — Early systematic review concluding evidence for pain was suggestive but limited by small, low-quality trials.
Moura CC, Chaves ECL, Cardoso ACLR, Nogueira DA, Corrêa HP. Cupping therapy and chronic back pain: systematic review and meta-analysis. Revista Latino-Americana de Enfermagem. 2018;26:e3094. doi:10.1590/1518-8345.2888.3094 — Meta-analysis reporting reduced chronic back pain intensity, while cautioning about study heterogeneity and bias.
Cramer H, Klose P, Teut M, Rotter G, et al. Cupping for Patients With Chronic Pain: A Systematic Review and Meta-Analysis. The Journal of Pain. 2020;21(9-10):943-956. doi:10.1016/j.jpain.2020.01.002 — Found short-term pain and disability improvements but rated overall evidence quality as low.
Kim S, Lee SH, Kim MR, Kim EJ, et al. Is cupping therapy effective in patients with neck pain? A systematic review and meta-analysis. BMJ Open. 2018;8(11):e021070. doi:10.1136/bmjopen-2017-021070 — Suggested short-term relief for neck pain, but with high risk of bias across the included trials.
Lauche R, Cramer H, Hohmann C, Choi KE, et al. The Effect of Traditional Cupping on Pain and Mechanical Thresholds in Patients with Chronic Nonspecific Neck Pain: A Randomised Controlled Pilot Study. Evidence-Based Complementary and Alternative Medicine. 2012;2012:429718. doi:10.1155/2012/429718 — Small randomized pilot showing reduced neck pain after cupping versus a waiting-list control.
Chi LM, Lin LM, Chen CL, Wang SF, et al. The Effectiveness of Cupping Therapy on Relieving Chronic Neck and Shoulder Pain: A Randomized Controlled Trial. Evidence-Based Complementary and Alternative Medicine. 2016;2016:7358918. doi:10.1155/2016/7358918 — RCT reporting lower neck-and-shoulder pain and improved local blood flow shortly after treatment.
AlBedah A, Khalil M, Elolemy A, Hussein AA, et al. The Use of Wet Cupping for Persistent Nonspecific Low Back Pain: Randomized Controlled Clinical Trial. The Journal of Alternative and Complementary Medicine. 2015;21(8):504-508. doi:10.1089/acm.2015.0065 — Trial of wet cupping (hijama) added to usual care for chronic low-back pain, with short-term improvement.
Bridgett R, Klose P, Duffield R, Mydock S, et al. Effects of Cupping Therapy in Amateur and Professional Athletes: Systematic Review of Randomized Controlled Trials. The Journal of Alternative and Complementary Medicine. 2018;24(3):208-219. doi:10.1089/acm.2017.0191 — Reviewed cupping in athletes and concluded the evidence was too limited and low-quality to draw firm conclusions.
Rozenfeld E, Kalichman L. New is the well-forgotten old: The use of dry cupping in musculoskeletal medicine. Journal of Bodywork and Movement Therapies. 2016;20(1):173-178. doi:10.1016/j.jbmt.2015.11.009 — Overview of dry cupping methods and proposed mechanisms in musculoskeletal care.
Lowe DT. Cupping therapy: An analysis of the effects of suction on skin and the possible influence on human health. Complementary Therapies in Clinical Practice. 2017;29:162-168. doi:10.1016/j.ctcp.2017.09.008 — Examines how negative pressure affects skin and circulation, and why the characteristic marks form.
Al-Bedah AMN, Elsubai IS, Qureshi NA, Aboushanab TS, et al. The medical perspective of cupping therapy: Effects and mechanisms of action. Journal of Traditional and Complementary Medicine. 2019;9(2):90-97. doi:10.1016/j.jtcme.2018.03.003 — Reviews proposed physiological mechanisms and the range of clinical uses reported for cupping.

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