Pain relief and inflammation

How cupping creates its effects

The suction from a cup creates negative pressure in the underlying tissue, pulling blood and interstitial fluid upward. This mechanical stimulus triggers several responses:

Increased local circulation. The negative pressure dilates capillaries, increasing blood flow to muscles that may be ischemic from chronic tension or overuse. Better perfusion brings oxygen and nutrients while clearing metabolic waste products like lactate that accumulate in chronically tight tissue.

Nervous system modulation. Cupping stimulates mechanoreceptors and nociceptors in the skin and fascia, sending afferent signals through peripheral nerves to the spinal cord. This appears to activate descending pain-inhibition pathways — essentially the same gate-control mechanism underlying other manual therapies. The result is reduced pain perception beyond the local treatment area.

Connective tissue release. The lifting action separates layers of fascia and connective tissue that have adhered together. This is particularly relevant for chronic pain, where myofascial adhesions often maintain a cycle of restricted movement and compensatory muscle tension.

Inflammatory modulation. Wet cupping (which involves small skin punctures to release a small amount of blood) shows anti-inflammatory effects in bloodwork, with reductions in prostaglandins and inflammatory cytokines. Dry cupping's anti-inflammatory mechanisms are less well characterized but appear to involve local tissue signaling rather than systemic immune effects [6].

Types of cupping and what they're used for

Dry cupping is the most common modern form. Cups made of silicone, glass, or plastic create suction without skin puncture. This is the method used in most clinical research and the type you'll encounter in sports medicine and physiotherapy settings. Applied to the back, neck, and shoulders for pain management and muscle recovery.

Moving cupping (gliding cupping) applies oil to the skin before gliding a suction cup along muscle bellies. This functions more like a deep tissue massage variant and is less likely to cause bruising. Often used for large muscle groups like the thoracic back, quadriceps, and hamstrings.

Wet cupping (hijama) involves briefly puncturing the skin before applying the cup to draw out a small quantity of blood. This is the form practiced in Islamic medicine and some traditional Chinese practices. The research base is smaller, and the infection risk — though low with proper sterile technique — is non-trivial. Not recommended outside trained practitioners who follow strict sterile protocols.

Flash cupping applies cups repeatedly in quick succession rather than leaving them in place. Often used for respiratory conditions and broader stimulation rather than focal pain.

What conditions have the most evidence

Chronic neck pain — the best-studied application. A meta-analysis of 18 RCTs found significant pain reduction and improved function compared to no treatment, with cupping also outperforming heat therapy in direct comparisons [5]. Kim et al. tested cupping against heating pads in office workers with chronic neck pain and found superiority at 6 sessions [4].

Chronic low back pain — a 2024 systematic review and meta-analysis found high-quality evidence that cupping significantly reduces pain at 2–8 weeks (effect size d=1.09, 95% CI: 0.35–1.83), with superiority over both medication and usual care [2]. Benefit was less clear at longer follow-up, suggesting cupping provides acute-to-subacute relief rather than permanent resolution.

Broader chronic pain — Cramer et al.'s meta-analysis of cupping across pain conditions found statistically significant reductions in pain intensity with moderate certainty of evidence [1]. Effect sizes were larger than placebo but varied across conditions.

Herpes zoster and post-herpetic neuralgia — one of the more surprising findings in Cao et al.'s review of 135 RCTs was particularly strong evidence for cupping in herpes zoster (shingles), where it appeared to accelerate skin healing and reduce neuralgia [6].

What to expect in a session

Sessions typically run 20 to 40 minutes. The practitioner cleans the skin, applies oil for moving cupping or leaves it dry for stationary cups, and places cups using either a hand pump, silicone squeeze, or briefly flaming the inside to create heat-driven suction (fire cupping). Cups stay in place for 5 to 15 minutes.

The sensation is a strong pulling or pressure, not pain. The characteristic circular bruising (ecchymosis) appears because capillaries rupture under the suction. This looks dramatic but is the same tissue response as a deep tissue massage bruise. It fades within 3 to 10 days. Darker marks indicate areas with more stagnation or restricted circulation.

Two to six sessions is a typical initial course for chronic pain. Sessions are usually spaced at least 3 to 7 days apart to let bruising resolve between treatments.

Finding a practitioner

In the United States, cupping is most commonly practiced by Licensed Acupuncturists (LAc), who receive formal training in cupping as part of their acupuncture curriculum. Physical therapists, chiropractors, and massage therapists also perform cupping with additional certification training.

Ask about their training specifically in cupping, not just their general credential. For wet cupping, verify they use single-use sterile lancets and proper barrier precautions.

Contraindications include: active skin infections or wounds at the treatment site, blood-thinning medications, bleeding disorders, pregnancy (over the abdomen and lower back), and active cancer. Inform your practitioner of all medications and health conditions.

See our acupuncture page for related information on traditional Chinese medicine approaches to pain, and the massage page for context on manual therapy more broadly.