What is cupping therapy? The marks, claims and evidence

Cupping is suction applied to the skin with a cup. NCCIH describes it as a practice used in traditional medicine in several parts of the world, including China and the Middle East. A practitioner places a cup — made of 1 of 4 materials: glass, ceramic, bamboo or plastic — on your skin and creates suction inside it. There are 2 ways to do that. The older method uses a flame to burn off the oxygen, then presses the cup to the skin. As the trapped air cools it contracts, and the drop in pressure pulls skin and surface tissue up into the cup. The newer method skips the fire and attaches a pump to the cup once it is in place.

Suction is what separates cupping from the rest of a spa menu. A massage therapist pushes down into tissue; cupping pulls tissue up and out, and that pull draws blood toward the surface. The pooled blood under your skin is what you are looking at when you see the marks.

Ten minutes, in most spa settings, ours included. At Organic Day Spa cupping is a 10 minute add-on attached to a booked massage, so the cups go on part-way through the session and come off with plenty of hands-on time left. Nobody lies under cups for an hour.

A steady upward tug, strongest in the first minute and duller after that. Most people describe it as strange rather than painful, closer to a vacuum than to pressure. If a cup draws hard enough to sting, say so while it is happening — a practitioner can release the seal and reseat the cup somewhere with more give.

Dry cupping leaves the skin intact; wet cupping pierces it so blood flows into the cup. NCCIH draws that line in a single sentence, and it is the first thing to settle before you book.

The gap is wider than the wording suggests. Dry cupping leaves a bruise. Wet cupping opens the skin by design and deliberately draws blood, which moves the risk from discoloration to open wound and brings bloodborne infection into the conversation. If a practitioner cannot tell you plainly which one they do, settle that before anything touches your back.

The circles themselves have nothing to do with impact, and nothing to do with toxins being pulled to the surface, whatever the marketing says. Suction ruptures tiny blood vessels under the skin, and blood leaks into the tissue around them. What you see afterwards is a flat round patch tracing the rim of the cup, red to purple and sometimes nearly black. Same biology as a bruise, produced by negative pressure instead of a blow.

The marks fade. NCCIH makes 1 practical point that is easy to overlook: tell your health care providers where they came from, so the round patches are not mistaken for signs of physical abuse. A clinician who sees symmetrical circular marks on someone's back with no context has reason to ask hard questions. Mention the cupping up front and you spare everyone the detour.

High-quality evidence is largely missing, which is a different verdict from a demonstrated failure. NCCIH's cupping fact sheet names no conditions the practice treats and cites no trials demonstrating that it works. The benefits section is, in effect, absent. When a research body that exists to evaluate complementary practices declines to make any benefit claim, that silence is itself a finding.

The surrounding context comes from how NCCIH handles traditional Chinese medicine (TCM) as a whole. On Chinese herbal products the agency reports that because many studies have been of poor quality, no firm conclusions can be made about their effectiveness — and that hedge is not for lack of looking, since those products have been studied across 4 problem areas: stroke, heart disease, mental disorders, and respiratory illnesses such as bronchitis and the common cold.

On acupuncture, a far more heavily studied practice than cupping, the picture runs genuinely both ways. Some trials find real acupuncture and sham acupuncture equally effective, which points to a placebo effect. Other studies suggest real acupuncture may help with 4 kinds of often-chronic pain: low-back pain, neck pain, osteoarthritis and knee pain, and carpal tunnel syndrome. It may also help on 2 headache fronts, reducing tension headaches and helping prevent migraines. Call that the texture of this literature: frequent placebo signals, and modest hedged findings where benefits do show up — 6 named conditions for acupuncture against 0 for cupping.

Acupuncture also shows what a real mechanism claim looks like. NCCIH names 2 effects that studies point to: acupuncture stimulates the release of the body's natural painkillers, and it affects brain areas involved in processing pain. You can argue about how much that explains, but it is testable and it has research attached. Cupping's pull-the-blood-to-the-surface story has 0 comparable mechanism findings in the agency's fact sheet.

Whatever relief a session brings may owe a good deal to expectation, attention, and the plain comfort of lying still while someone tends to your back. That is a real effect for the person feeling it, and at $20 on top of a massage it is a cheap thing to try. Calling it a proven physiological treatment is a different claim, and the published evidence does not carry it.

Five documented harms, plus 2 rare severe events. NCCIH lists persistent skin discoloration, scars, burns and infections, and notes that cupping can make eczema or psoriasis worse — 4 direct harms plus 1 flare risk. Burns trace straight back to the fire method, since an open flame near skin to create suction carries an obvious hazard. Discoloration that never fades and outright scarring are also on the record, which cuts against the idea that the marks are always harmless and brief.

The 2 severe cases NCCIH flags are bleeding inside the skull, reported after cupping on the scalp, and anemia from blood loss, reported after repeated wet cupping. Both are uncommon, both are reported events rather than theoretical worries, and both cluster around the more aggressive forms of the practice.

The infection risk earns its own line. Cupping equipment can pick up blood, intentionally in wet cupping and inadvertently in dry. Reusing it on another person without sterilising it between clients can spread bloodborne disease; NCCIH names 2, hepatitis B and C. Dry cupping made that list as well, because suction alone breaks enough surface vessels to leave blood on the gear.

Skip cupping therapy if you bruise or bleed easily, take a blood thinner, or have eczema or psoriasis over the area being worked. If you are pregnant, ask your own clinician before you book. At Organic Day Spa the cups go along the back and the marks fade over a few days, so tell your therapist at the start of the session if you would rather leave the add-on off.

Usually a few days, fading the way a bruise does, from purple through green to yellow. They sit where the rim of each cup sealed, which makes them round and evenly spaced rather than blotchy. Plan around them if you have a wedding, a photo shoot or a swim meet in the coming week.

No, and the tradition's own record is the clearest argument against it. Cupping is usually presented inside traditional Chinese medicine. NCCIH describes that as a system evolved over thousands of years, using psychological and physical approaches such as acupuncture and tai chi alongside herbal products. Line up 4 practices from that one tradition and they have fared very differently under modern testing.

Tai chi comes out best. NCCIH points to 3 findings: it may improve balance and stability in older people and those with Parkinson's disease, reduce pain from knee osteoarthritis, and help people cope with fibromyalgia and back pain. Acupuncture lands in the middle described above, with 6 named conditions and a persistent placebo signal. Chinese herbal products, despite centuries of use and 4 problem areas studied, stay unproven because the studies are weak. Cupping brings up the rear at 0. Same tradition, same age behind each practice, sharply different evidence in front of each one.

Long use guarantees nothing about safety either. Reviews have found some Chinese herbal products contaminated across 5 categories: undeclared plant or animal material; drugs, including 2 the agency names — the blood thinner warfarin and the anti-inflammatory diclofenac; 3 heavy metals, arsenic, lead and cadmium; pesticides or sulfites; and, in some products, the wrong herbs entirely, a few of which have caused organ damage. Those are supply-chain problems rather than flaws in the old idea, and they show how a centuries-old label can sit on top of a product nobody has verified.

Technique matters more than tradition, and technique is something you can watch in the room. NCCIH names 4 serious acupuncture complications: infections, punctured organs, collapsed lungs, and injury to the central nervous system. It traces all of them to nonsterile equipment and improper delivery, not to the idea behind the practice. The same questions apply at a cupping table. How are the cups cleaned? How hard are they drawn? Does the practitioner check with you before placing another one?

Treat it as low-evidence comfort care rather than a medical treatment, and the decisions get simple. The checklist below runs in order, 5 steps, and every line traces back to the safety record above. At Organic Day Spa cupping is a 10 minute add-on at $20, placed along the back inside a longer session. A Body Massage runs 45 to 120 minutes; the hour is $90, and adding the cups brings it to $110.

If you would rather ask before booking, call Organic Day Spa at (650) 567-8886 or come by 200 California Avenue, Suite 180, Palo Alto, CA 94306. The California Avenue Caltrain stop is a five-minute walk along the same street, and there is metered parking outside the door. Organic oil, hot towels and a hot stone add-on come with every massage at no extra charge.

One boundary NCCIH attaches to traditional Chinese medicine broadly applies here in full: do not let cupping replace or delay conventional care for a real condition. If you take medication, are pregnant, have a skin condition, or bruise or bleed easily, talk it through with your own clinician first.