Cupping therapy shows some promise for reducing inflammation, but the evidence is still limited and mostly low quality. A handful of clinical trials have measured drops in inflammatory markers after cupping sessions, and meta-analyses show it can reduce pain in conditions driven by inflammation. However, major health authorities, including the National Center for Complementary and Integrative Health, note that most cupping research has significant limitations, making it hard to draw firm conclusions.
Here’s what we actually know so far, what the numbers show, and what’s still uncertain.
What Happens in the Body During Cupping
Cupping works by placing cups on the skin and creating suction, either through heat or a mechanical pump. This pulls blood toward the surface, stretches underlying tissue, and creates localized pressure changes. The circular marks left behind are essentially controlled bruises, areas where small blood vessels have broken and blood has pooled beneath the skin.
That bruising isn’t just cosmetic. When tissue is mechanically stressed this way, the body launches a localized healing response. Blood flow to the area increases, and immune cells move in to clean up damaged tissue. The theory is that this controlled micro-injury resets the local inflammatory environment, clearing out stagnant metabolic waste and encouraging fresh circulation. The suction may also stimulate the release of signaling molecules that help dial down chronic, low-grade inflammation in the surrounding tissue.
One proposed pathway involves a protective enzyme called heme oxygenase-1, which the body produces in response to oxidative stress. This enzyme breaks down heme (a component of hemoglobin released from damaged red blood cells) into compounds that have antioxidant, anti-inflammatory, and cell-protective effects. Since cupping deliberately causes localized bleeding under the skin, it may trigger this enzyme system. The breakdown products include molecules shown to reduce inflammation in conditions ranging from cardiovascular disease to liver injury. However, direct measurements of this enzyme’s activation during cupping are still lacking in published trials.
What Inflammatory Markers Show
The most concrete evidence comes from studies measuring C-reactive protein (CRP), a blood marker that rises when inflammation is present throughout the body. In a randomized controlled trial of women with chronic pelvic pain, those who received dry cupping on specific acupoints saw their high-sensitivity CRP levels drop from an average of 2.2 mg/L to 1.32 mg/L after treatment. That’s roughly a 40% reduction. The control group’s CRP also decreased, but only modestly, from 2.36 mg/L to 1.98 mg/L. The difference between the two groups was statistically significant.
That same trial found corresponding drops in pain scores, suggesting the reduction in CRP wasn’t just a lab curiosity. It tracked with how patients actually felt. The cupping group reported significantly lower pain intensity and less impact on daily life compared to controls.
Still, this is one trial in one specific condition. CRP responds to many things, including stress reduction, improved sleep, and placebo effects. Without larger studies replicating these findings across different populations, the CRP data is encouraging but far from conclusive.
Effects on Pain and Chronic Back Problems
Where cupping has the most research support is in pain reduction, particularly for chronic back pain. A systematic review and meta-analysis of randomized controlled trials found that cupping therapy was significantly more effective at reducing pain intensity than control treatments. The pooled analysis showed an average pain score reduction of 1.59 points on standard pain scales compared to controls, a clinically meaningful difference.
The studies also measured something called the nociceptive threshold, essentially how much pressure you can tolerate before it hurts. People with chronic spinal pain tend to have a much lower threshold than healthy people, meaning their nervous systems are sensitized. Several of the reviewed trials found that cupping raised this threshold, suggesting it may help calm an overactive pain response rather than simply masking discomfort.
Whether these pain benefits stem directly from reduced inflammation, improved blood flow, nervous system changes, or some combination remains unclear. Pain and inflammation overlap heavily, but they’re not the same thing. It’s possible cupping addresses pain through mechanisms that have nothing to do with inflammatory pathways, such as stimulating nerve fibers that compete with pain signals or simply promoting relaxation.
Dry Cupping vs. Wet Cupping
There are two main types. Dry cupping uses suction alone, while wet cupping involves making small incisions in the skin before applying cups, allowing a small amount of blood to be drawn out. Practitioners of wet cupping have traditionally argued that removing blood also removes inflammatory substances and toxins, though that claim lacks strong scientific backing.
Both methods create the same basic suction effect, and both are used in studies showing pain reduction. The CRP trial mentioned above used dry cupping specifically, which suggests you don’t need the incision-based approach to see measurable changes in inflammatory markers. Head-to-head comparisons between the two methods are scarce, so there’s no strong evidence that one is better than the other for inflammation specifically.
Where the Evidence Falls Short
The NCCIH’s current position is straightforward: there’s been some research on cupping, but most of it is low quality. They note that cupping may help reduce pain, though the evidence isn’t very strong, and there isn’t enough high-quality research to support its use for other conditions.
Several problems plague the existing studies. Many have small sample sizes, making it difficult to rule out chance findings. Blinding is nearly impossible with cupping since participants obviously know whether cups were placed on their skin. This opens the door to significant placebo effects, which are particularly powerful for pain-related outcomes. The meta-analysis on back pain also flagged moderate to high heterogeneity across studies, meaning the trials varied enough in design and results that combining them introduces uncertainty.
Most trials also measure outcomes over short periods, typically a few weeks. Whether cupping produces lasting anti-inflammatory effects or just temporary shifts is unknown. And while a 40% CRP drop sounds impressive, CRP fluctuates naturally, and longer follow-up would help clarify whether the change persists.
What This Means in Practice
If you’re considering cupping for an inflammatory condition, the honest answer is that it might help, particularly with pain, but the biological case for a true anti-inflammatory effect is still being built. The CRP data provides a starting point, and the pain research is moderately supportive, but neither body of evidence is strong enough to call cupping a proven anti-inflammatory therapy.
Cupping is generally considered safe when performed by a trained practitioner. The main side effects are the circular bruises, which typically fade within a week or two, and occasional mild soreness. Skin burns can occur with fire cupping if done improperly, and wet cupping carries a small risk of infection. People taking blood thinners or those with bleeding disorders should be cautious.
For conditions with well-established anti-inflammatory treatments, cupping is best thought of as a complementary option rather than a replacement. It may offer additional relief alongside other approaches, but relying on it as your sole strategy for managing a serious inflammatory condition isn’t supported by current evidence.