Chinese cupping is a therapy rooted in traditional Chinese medicine (TCM) that uses suction cups placed on the skin to promote blood flow, relieve muscle tension, and reduce pain. Practitioners create a vacuum inside glass, plastic, or bamboo cups, which draws the skin and underlying tissue upward. The practice dates back thousands of years to one of the earliest Chinese medical texts, the Huangdi Neijing, and remains widely used today for musculoskeletal pain, recovery, and general wellness.
The Traditional Theory Behind Cupping
In TCM, disease and pain are often attributed to blockages in the flow of Qi (the body’s vital energy) and blood stasis. These blockages, called “bi” or obstructions, were traditionally thought to result from the invasion of external factors like wind, cold, or dampness that disrupted normal circulation. Cupping was developed as a way to clear those obstructions, restore the flow of Qi, and expel environmental pathogens from the body.
That framework guides how traditional practitioners decide where to place cups, how long to leave them, and which type of cupping to use. While the language of Qi and energy channels is specific to TCM, the therapy’s observable effects on circulation and muscle tension have drawn interest from Western researchers and clinicians as well.
How Cupping Works in the Body
The suction from a cup stretches the skin and dilates the small blood vessels underneath. This triggers the release of natural vasodilators, including histamine and adenosine, which expand blood vessels further and increase local blood flow. The result is a measurable improvement in microcirculation: more blood reaches the treated area, capillary repair speeds up, and new small blood vessels begin forming in the tissue.
One proposed explanation centers on nitric oxide. The mechanical stretching from cupping appears to stimulate cells lining the blood vessels to produce nitric oxide, which relaxes blood vessel walls, lowers local vascular resistance, and inhibits the clumping of platelets. These changes collectively promote healing in areas with chronic tension or inflammation.
Cupping also appears to nudge the immune system. The suction creates a localized, controlled inflammatory response, essentially a signal that recruits immune cells to the area. Studies have found that cupping shifts the local balance of white blood cells, lowering the number of lymphocytes while increasing neutrophils, a type of cell involved in fighting infection. It also activates the complement system (a set of proteins that assist immune responses) and raises levels of immune signaling molecules like interferon. In practical terms, this means the body mounts a targeted cleanup response in the cupped area.
Types of Cupping
There are several distinct methods, and the one used depends on the condition being treated and the practitioner’s training.
- Dry cupping (fire cupping): The traditional approach. A practitioner briefly places a flame inside a glass cup to burn out the oxygen, then quickly applies the cup to the skin. As the air inside cools, it contracts and creates suction. A more modern version skips the fire entirely and uses a hand pump to pull air out of the cup.
- Wet cupping (hijama): After a brief round of dry cupping to draw blood to the surface, the practitioner removes the cups and makes very small, superficial incisions with a sterilized blade. The cups go back on, and the vacuum draws out a small amount of blood. The area is then cleaned with alcohol and bandaged. This method has a long history in both Chinese and Middle Eastern medicine.
- Moving cupping: Oil is applied to the skin first, and then the cups are slid across a larger area while maintaining suction. This combines the effects of cupping with a deep-tissue massage-like stretch.
Most practitioners today use glass or plastic cups. Bamboo and silicone cups are also common, particularly for moving cupping on curved body areas.
What a Session Feels Like
During a typical session, the practitioner places several cups along the back, shoulders, neck, or other target areas. You’ll feel a pulling or tightening sensation as the skin lifts into the cup. Most people describe it as intense but not painful, similar to a deep-tissue massage. The cups stay in place for roughly 5 to 15 minutes, though the exact duration varies based on the individual. Practitioners generally keep first sessions shorter to see how the body responds.
For moving cupping, expect a gliding, stretching sensation as the cups are drawn across oiled skin. Wet cupping involves the additional step of tiny skin incisions, which feel like light scratches. The amount of blood drawn is small, typically capped at around 100 milliliters per site for safety.
The Circular Marks
The most visible effect of cupping is the set of round, reddish-purple marks left behind. These are not bruises in the traditional sense. Bruises result from impact that damages tissue, while cupping marks come from the dilation and slight rupture of surface capillaries caused by the suction. The technical terms are petechiae (tiny red dots) and ecchymoses (larger areas of discoloration), but the marks look similar to bruises.
They typically fade within one to two weeks. The color and intensity vary from person to person and session to session. Darker marks are often interpreted in TCM as a sign of more stagnation in that area, though from a biomedical perspective, they simply reflect how the local capillaries responded to the vacuum pressure.
What the Evidence Says About Pain Relief
Cupping has the strongest evidence base for musculoskeletal pain, particularly in the neck and lower back. A systematic review and meta-analysis of 18 studies found that cupping significantly reduced neck pain compared to both no treatment and active control treatments like medication or physical therapy. Function and quality of life also improved. Most reported side effects were mild and temporary.
A broader review of cupping in sports rehabilitation rated the evidence as moderate for improving soft tissue flexibility and low to moderate for reducing lower back and cervical pain. For other musculoskeletal conditions, evidence was rated very low to low. The therapy gained mainstream visibility when Olympic athletes appeared at the 2016 Rio Games covered in cupping marks, though researchers note that athletic popularity has outpaced the scientific evidence for performance recovery.
The overall picture is that cupping likely helps with pain and blood flow in the treated area, but high-quality, large-scale trials are still limited. It appears most useful as a complement to other treatments rather than a standalone therapy.
Risks and Side Effects
Cupping is generally safe when performed by a trained practitioner, but it does carry risks. The most common side effects are skin discoloration, mild burns (from fire cupping), and temporary soreness. More concerning but rare complications include scarring, skin infections, and worsening of existing skin conditions like eczema or psoriasis.
Wet cupping introduces additional risks because it breaks the skin. Proper sterilization is essential to prevent infection. People taking blood-thinning medications may bleed more than expected during wet cupping and need careful monitoring. Rare but serious adverse events have been documented, including bleeding inside the skull after cupping on the scalp and anemia from repeated wet cupping sessions with excessive blood loss.
Aftercare
After a session, the treated skin is sensitive and needs basic care. Avoid swimming, saunas, hot baths, and ice baths for at least 24 hours, as extreme temperatures and prolonged moisture can irritate the area. Normal showers are fine after a few hours. Keep the cupped areas clean, dry, and out of direct sun while the marks are still visible. Drinking extra water afterward helps support circulation and recovery, which is standard advice for most manual therapies that increase blood flow.