How to Use a Massage Gun Safely: Where to Use It and Where Never To

The short answer

Use a percussive massage device on large muscle groups only, keep it moving rather than holding it in one spot, start on the lowest setting, and stop the moment it hurts.

That last rule is not a figure of speech. When Stiftung Warentest tested eleven massage guns in June 2024, its testers found some devices strong enough that haematomas — bruising — could occur. The organisation's guidance is direct: treat muscles and tissue only, and if it hurts, stop the treatment.

The four areas you should never treat

Stiftung Warentest states that massage guns must not be applied to:

• Injuries — including strains, tears and anything inflamed or healing
• Bones — bony prominences such as the spine, shoulder blades, elbows, knees and shins
• Blood vessels — the front and sides of the neck, the inside of the elbow, the back of the knee, the groin
• Nerve pathways — anywhere a nerve runs close to the surface

Where percussive devices are appropriate

Slavko Rogan of Bern University of Applied Sciences, Department of Health, told the Swiss consumer programme Kassensturz: "Massage only on musculature, on large muscle groups — glutes, back, front and rear thigh, the calves, and the shoulder region with the upper and forearms."

Note what is absent from that list: the front and sides of the neck, the abdomen, the head, the joints themselves, and anywhere with thin tissue over bone. If you cannot name the muscle you are treating, that is a reason to stop and check.

How long, how hard, how often

Start low. Every massage gun has a fixed amplitude — the distance its head travels. You cannot adjust that, only the frequency. Warentest found devices ranging from gentle to powerful, and its testers experienced some as too strong.

Keep it moving. The 2023 systematic review in the International Journal of Sports Physical Therapy describes the technique as floating the device over the surface of the skin, applying vibration and rapid pulses in short bursts to the muscle belly or tendon.

Mind the frequency. Warentest makes a distinction most marketing skips: below roughly 30 strikes per second muscles relax, and most devices tested strike faster than that — which prepares muscles for training rather than relaxing them afterwards. If your goal is winding down, lower settings are not a compromise, they are the correct setting.

Self-massage beats having someone else do it. When you treat yourself you feel exactly where the pressure lands. Rogan: "Self-massage is very good if you are mobile and can reach everywhere." Only where you genuinely cannot reach should a second person take over — and then more gently, because they cannot feel what you feel.

Warning signs to stop immediately

The last point is uncommon but documented. A case report published in the journal Physical Therapy describes rhabdomyolysis following percussion massage gun use — a condition in which damaged muscle tissue releases its contents into the bloodstream. The authors describe it as the first reported case of its kind and as a severe and potentially life-threatening illness.

This is a single case report, not a reason to avoid these devices. It is a reason to respect session length and intensity rather than assuming more is better.

• Sharp or increasing pain, as opposed to the dull pressure of massage
• Numbness, tingling, or pins and needles
• Bruising appearing during or after use
• Skin that stays red or marked well after you finish
• Dizziness or light-headedness
• Dark-coloured urine or unusual, severe muscle weakness after a long session — seek medical advice promptly

Who should talk to a clinician first

• You take anticoagulants or bruise easily
• You have osteoporosis or reduced bone density
• You have a history of deep vein thrombosis or a clotting disorder
• You have varicose veins in the area you intend to treat
• You have diabetes with any reduction in sensation
• You have an implanted device such as a pacemaker
• You are pregnant
• You are recovering from surgery or a recent injury
• You have any skin condition, wound or infection in the area

What the evidence does and does not show

The strongest available synthesis is a systematic review by Sams and colleagues, published in the International Journal of Sports Physical Therapy in April 2023, covering thirteen studies. It found a significant relationship between a single application and acute increases in muscle strength, explosive strength and flexibility, and that multiple treatments reduced reported musculoskeletal pain.

The authors' own assessment of that evidence: "All studies had limitations in methodological quality or reporting of findings."

Rogan puts it plainly: "There are studies showing tendencies that recovery capacity and mobility improve after using massage guns. But there are no really large studies confirming this."

So: a reasonable tool for short-term mobility and perceived soreness, supported by modest evidence. Not a treatment for any medical condition, and not a substitute for physiotherapy or medical care.