The ancient art of scraping — drawing stagnant Blood to the surface so the body can finally let it go, and the flow of life can resume.
Gua sha (pronounced "gwah shaw") is one of the oldest techniques in the Chinese medical tradition — a method of pressing and stroking a smooth-edged tool across oiled skin to create petechiae, the small red or purple spots called sha (literally "sand" or "prickly heat"). The term gua means to scrape or press-stroke; the sha describes the reddish, slightly raised skin discolouration that emerges when stagnant Blood near the surface is brought upward through the capillary bed.
What appears dramatic — the temporary red marks across the neck, back, or chest — is in practice a remarkably gentle therapy. The tools used at Rainbow Medicine are smooth jade or rose quartz gua sha stones, shaped with a curved edge that conforms to the body's contours, and sometimes traditional buffalo horn tools for deeper work. The strokes follow the direction of muscle fibres and meridian pathways, applying sustained downward pressure that lifts and releases the tissue beneath.
Gua sha has analogues across multiple Asian healing traditions: it is known as kerokan in Indonesia, cao gio in Vietnam, and khoud lam in Laos — everywhere that Chinese medicine travelled, this scraping technique accompanied it. In contemporary practice, it has gained new attention both through research into its molecular mechanisms and through the viral popularity of facial gua sha for skin health and lymphatic drainage.
A critical distinction for new patients: gua sha marks are not bruises. A bruise results from traumatic rupture of capillaries due to external impact — it is painful to touch and surrounded by swelling. Gua sha petechiae result from intentional pressure that draws extravasated blood cells — already present in the tissue from prior stagnation — to the surface. They are typically not tender to touch, and most patients are surprised to find them painless. They resolve within 3–7 days as the immune system clears the material through lymphatic drainage.
In TCM, the nature of the sha provides diagnostic information about the patient's underlying condition:
Heat pattern, acute condition, or active inflammation. Fresh, well-oxygenated blood near the surface.
Significant Blood stagnation, chronic condition. Often associated with long-standing pain or post-viral fatigue.
Stagnation with some Damp-Heat. Common in digestive congestion, liver-related patterns.
Qi or Blood deficiency. Minimal stagnation but constitutional weakness requiring tonification.
Either very little stagnation, or significant Yin and Blood deficiency — the body lacks sufficient Blood to draw to the surface.
The most significant research contribution to understanding gua sha's mechanisms came from Dr Nir Haas and colleagues at Harvard Medical School. Their studies found that gua sha significantly upregulates Heme Oxygenase-1 (HO-1) — an enzyme produced in response to haem (from red blood cells released during the treatment) that has powerful anti-inflammatory, antioxidant, and cytoprotective effects. HO-1 activity persisted for several days after treatment, offering an explanation for the lasting clinical benefits that patients and practitioners observed long after the sha itself had faded.
HO-1 induction has implications across a wide range of inflammatory conditions: it inhibits the production of pro-inflammatory cytokines, reduces oxidative stress, promotes immune modulation, and supports tissue repair. This provides a credible molecular bridge between an ancient empirical observation — "gua sha reduces pain and inflammation" — and contemporary biochemical understanding.
Post-viral fatigue syndromes, including Long COVID, are characterised by persistent inflammation, mitochondrial dysfunction, and what TCM describes as Lingering Pathogen lodged in the defensive layers — a Qi and Yin depleted state where the body cannot fully clear the pathogenic influence. Gua sha over the upper back, chest, and neck — particularly along the Lung and Bladder meridians — has been integrated into post-viral recovery protocols, drawing on both its classical role in expelling exterior pathogens and its modern HO-1 anti-inflammatory mechanism. Many patients with Long COVID describe the persistent heaviness and congestion that gua sha seems to uniquely address, particularly when combined with acupuncture and herbal support.
The most common indication. Years of desk work, screen use, and accumulated stress create dense fascial adhesions and Blood stagnation in the trapezius, levator scapulae, and cervical paraspinals. Gua sha can address layers of tension that manual massage cannot reach, often producing immediate relief that lasts for days.
Adhesive capsulitis involves significant Blood stagnation and often an underlying pattern of Wind invasion. Gua sha over the shoulder region — particularly the deltoid, rotator cuff, and posterior shoulder — combined with acupuncture at SI-9, LI-15, and ST-38 has been used clinically for decades with meaningful results.
The persistent heaviness, chest tightness, and brain fog of post-viral syndromes respond to gua sha over the upper back and chest. The anti-inflammatory HO-1 upregulation, combined with lymphatic stimulation, assists the body's stalled recovery process.
Historically, gua sha was used to bring down fevers and address the early stages of respiratory infections — drawing the pathogenic Heat outward from the interior. Over the chest and upper back during acute respiratory illness, gua sha can assist expectoration and reduce the duration of symptoms.
The stagnant Blood that accumulates with chronic fatigue — particularly post-exertional malaise — responds to the clearing action of gua sha. Patients often notice improved energy and reduced body heaviness in the days following treatment.
Gentle facial gua sha with rose quartz or jade tools stimulates lymphatic drainage, reduces puffiness, improves microcirculation, and supports the natural lift of facial musculature. It is not a cosmetic procedure per se — but improved tissue health often manifests as clearer, more luminous skin.
See also: Acupuncture | Chronic Fatigue
Gua sha at Rainbow Medicine is almost always integrated within an acupuncture appointment rather than as a standalone procedure. Following TCM assessment, Dr Christine Shen will apply a small amount of lubricating oil to the area to be treated — typically the neck, upper back, chest, or shoulders — and then perform unidirectional press-stroking with the gua sha tool, following the direction of muscle fibres and meridian pathways.
The sensation is one of firm, sustained pressure — not sharp or cutting, but a deep stroking that many patients find profoundly satisfying, particularly in areas of long-held tension. Areas with significant stagnation may be slightly tender; this typically resolves as the treatment progresses and the sha emerges. Most patients feel a notable lightening of tension in the treated area within minutes.
After treatment, the affected area should be kept warm and protected from wind and cold for 24 hours — the pores are dilated and the body is temporarily vulnerable to exterior pathogens. Avoid swimming, cold showers on the area, or vigorous exercise for the remainder of the day. The sha marks will darken over the first few hours before beginning to fade. With repeated treatments, they resolve progressively more quickly as underlying stagnation clears.
Contraindications include active skin inflammation, sunburn, open wounds, active bleeding disorders, or use of blood-thinning medications (which require careful discussion). Gua sha is avoided during the first trimester of pregnancy. Dr Christine Shen will assess all relevant factors during your consultation.
Whether you carry tension in your neck, fog in your mind, or the lingering weight of a past illness — gua sha at Rainbow Medicine offers a path to release. Dr Christine Shen practises at Lane Cove and Freshwater, Sydney.
Book a ConsultationInitial $150 / 90 min | Follow-up $110 / 60 min | 0410 699 065
