- — IASTM is a category; Graston Technique is a branded approach within the broader instrument-assisted field.
- — Gua sha may refer to traditional press-stroking practice and is not simply another name for every clinical IASTM session.
- — No tool has been shown to work for everyone or to diagnose and physically erase scar tissue through the skin.
- — The useful comparison is diagnosis, clinician training, tolerability, functional goal, and reassessment—not tool prestige or skin color.
- — Screening matters with skin disease, infection, fracture, bleeding risk, vascular conditions, cancer, recent surgery, and other precautions.
Graston, IASTM, and gua sha are not interchangeable labels. IASTM describes a broad category of instrument-assisted soft-tissue techniques. Graston Technique is a branded approach with its own training and protocol context. Gua sha usually refers to a traditional or contemporary press-stroking practice that may intentionally create petechiae. The same-looking instrument does not make the clinical claims or evidence identical.
What is the difference in terminology?
- IASTM: a category, not one standardized dose, instrument, or treatment sequence.
- Graston Technique: a branded IASTM approach; the brand does not diagnose the painful structure or establish superiority for every condition.
- Gua sha: a traditional and contemporary term with cultural context and variable methods; visible petechiae may be intentional.
None of these names can identify a nerve, joint, vessel, infection, fracture, or scar through intact skin. A clinician still needs to decide what problem is being treated and whether surface instrument contact is appropriate.
What does the evidence actually compare?
IASTM studies use different tools, body regions, diagnoses, comparison treatments, and outcome measures. An earlier systematic review reported selected signals, but the updated review found very-low-quality evidence and no clinically meaningful overall improvements in function or pain compared with other active treatment. That is a reason for a monitored trial, not a universal promise.
One small ankle study compared Graston with another IASTM approach and did not find a difference between the two. It can support the modest conclusion that both may be considered in a defined protocol; it cannot prove that the brand is better for every tendon, muscle, or joint. Gua sha evidence is a separate evidence stream: a systematic review found the pain-management evidence insufficient, and proposed mechanisms remain hypotheses rather than established tissue repair.
How should a clinician choose?
Start with the clinical question
Is the goal to improve a specific movement, load tolerance, pain sensitivity, or exercise participation? If the question is not clear, changing tools will not solve the uncertainty.
Use the least provocative input
Pressure, duration, and location should respect skin, nerves, blood vessels, medical history, and irritability. More pain and darker marks are not better doses.
Reassess a meaningful task
Compare movement or function before and after a brief trial, then check whether the response lasts and allows active rehabilitation.
Change course when needed
If symptoms flare, sensation changes, skin response is unexpected, or function does not improve, reconsider the diagnosis and plan instead of automatically escalating scraping.
What are the safety limits?
Ask for screening before IASTM or gua sha with open wounds, active skin inflammation, infection or fever, an unhealed fracture, bleeding disorder, anticoagulant or antiplatelet medicine, vascular disease, prominent varicose veins, recent surgery, cancer in the area, or pregnancy. Stop for severe pain, new numbness or weakness, unusual bleeding, rapidly increasing swelling, fever, or worsening function. Seek urgent assessment for sudden severe pain or major loss of function.
Need help choosing the next step in Vigan?
A physiatry assessment can compare active rehabilitation, education, hands-on care, and a carefully monitored instrument trial. It may also identify when scraping is not the right option.
Bottom line
Choose the clinician and plan that can explain the diagnosis, risks, goal, alternatives, and reassessment criteria—not simply the most expensive or recognizable tool. If a scraping trial is used, its success should be measured by safer, more useful function over time, not by bruising.
References & Clinical Evidence
- [1] Seffrin CB, et al. (2019). Instrument-Assisted Soft Tissue Mobilization: A Systematic Review and Effect-Size Analysis. Journal of Athletic Training. PMID: 31322903.
- [2] Nazari G, et al. (2023). Effectiveness of instrument-assisted soft tissue mobilization: updated systematic review with meta-analyses. Disability and Rehabilitation. PMID: 35611579.
- [3] Cheatham SW, et al. (2025). International Expert Consensus on Instrument-Assisted Soft-Tissue Mobilization Precautions and Contraindications. Healthcare. PMID: 40150492.
- [4] Sevier TL, Stegink-Jansen CW. (2015). Reliability and validity of a new instrument-assisted soft tissue mobilization technique for ankle dorsiflexion. PMID: 33238244.
- [5] Lee MS, et al. (2010). Gua sha for pain management: a systematic review. Journal of Pain. PMID: 20205902.
- [6] Chu ECP, et al. (2021). Exploring scraping therapy: contemporary views on an ancient healing. Journal of Family Medicine and Primary Care. PMID: 34660401.
* Clinical references are provided to support the medical claims made in this article. TeraCare adheres to evidence-based practices in physical medicine and rehabilitation.
Dr. Ben Rabara
Dr. Ben Rabara is a Board-Certified Physiatrist specializing in Physical Medicine and Rehabilitation. He focuses on non-surgical, precision treatments for musculoskeletal conditions, utilizing advanced diagnostics like MSK Ultrasound.
Medical Disclaimer: The information provided in this article is for educational purposes only and does not substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified physician for your specific health conditions.