Can a Massage Gun Cause Blood Clots?

Massage guns are unlikely to create blood clots in healthy tissue under normal use, but the published medical literature documents several scenarios where percussive or vibration-based massage devices have contributed to serious vascular events, including stroke. The risk concentrates heavily around the neck, in people with pre-existing clots, and when devices are used aggressively on vulnerable areas. Understanding which situations carry genuine danger and which are safe is more useful than a blanket yes-or-no answer.

What Massage Guns Actually Do to Your Blood Vessels

Before getting into clots, it helps to know what these devices do at the tissue level. A massage gun delivers rapid, repetitive percussive force into soft tissue, typically at frequencies between 20 and 50 hertz. That mechanical energy does not stay local. It vibrates through muscle, connective tissue, and the walls of nearby blood vessels, producing measurable changes in blood flow.

A study measuring popliteal artery blood flow (behind the knee) found that localized vibrations at 38 Hz and 47 Hz significantly increased both volume flow and mean blood velocity compared to resting conditions, and the effect persisted longer than vibrations at lower frequencies.¹ Separately, an observational study of Theragun application on the quadriceps found that skin temperature rose by an average of about 3.8°C after treatment, with blood flow speed and flux both spiking immediately and muscle oxygen saturation climbing over the following five minutes.²

In healthy tissue with intact blood vessels, this increased blood flow is generally the point. It supports muscle recovery, reduces perceived soreness, and improves local circulation. The blood moves faster, vessels dilate slightly, and nothing goes wrong. The trouble starts when those mechanical forces meet compromised vessels, fragile plaques, or existing clots that have no business being jostled.

The Neck Is Where the Real Danger Lives

If you read through the case reports linking massage devices to blood clots and stroke, the neck comes up again and again. The reason is anatomical: the carotid arteries, which carry the majority of blood supply to your brain, run just beneath the skin on either side of the neck. They are not buried deep under layers of protective muscle like, say, the femoral artery in your thigh. A device pressing percussive force into the side or front of the neck is essentially hammering directly against a major artery wall.

In a published case, a 79-year-old man developed left upper extremity weakness after using a handheld electric neck massager. Imaging showed a ruptured atherosclerotic plaque at the right internal carotid artery bulb, with acute infarcts in the territory supplied by the right middle cerebral artery. In plain terms, the massager’s mechanical force broke open a fatty plaque that had been sitting inside his carotid artery, and pieces of that plaque traveled to his brain and caused a stroke.³ The researchers noted that neck massager use can contribute to thromboembolic stroke in rare cases when atherosclerotic plaque is already present.

A separate case involved a 49-year-old woman who presented with left limb weakness and difficulty speaking after using a neck massager for about a month. CT angiography of her neck revealed blood clots in both common carotid arteries, roughly 2 cm below the carotid sinus on each side. Notably, she had no history of high blood pressure, diabetes, heart disease, vasculitis, or any inherited clotting disorder. The investigators concluded that the neck massager caused the carotid thrombosis.⁴

That second case is particularly striking because the patient had no obvious risk factors. The repeated mechanical trauma to the carotid artery wall, sustained over weeks of regular use, was enough on its own to injure the vessel lining and trigger clot formation. This suggests the neck is a high-risk zone even for younger, otherwise healthy users, not just for elderly patients with pre-existing arterial disease.

Handheld Massagers Versus Percussion Massage Guns

A fair question is whether the neck massage cases involved the same type of device you would buy as a “massage gun.” The cases above describe handheld electric neck massagers, which can differ in design from a typical percussion gun like a Theragun or Hypervolt. Some neck massagers use kneading rollers or sustained pressure rather than rapid percussion. The mechanical principle is shared, though: force is applied to tissue overlying a superficial artery. A percussion massage gun operating at high amplitude on the side of the neck could produce similar or even greater acute force than a kneading-style device.

The systematic review literature on massage guns explicitly lists the neck among areas where use should be avoided, along with the face, head, chest, spine, and areas near superficial nerves and vessels.⁵ This warning is not hypothetical caution. It is grounded in the same vascular anatomy that produced the stroke cases.

Why Existing Clots Make Everything Worse

The most commonly cited blood-clot risk with massage guns is not that they will create a clot from scratch in healthy tissue. It is that they can dislodge a clot that already exists. If you have a deep vein thrombosis, the clot is sitting inside a vein, often in the calf or thigh. Applying percussive force directly over or near that clot can mechanically shake it loose. A dislodged clot that travels through the venous system to the lungs becomes a pulmonary embolism, which can be fatal.

A systematic review of massage gun effects and safety flagged deep vein thrombosis and blood clotting disorders as explicit contraindications, noting that the pressure from these devices might dislodge blood clots and cause serious health complications.⁵ This applies equally to known clots and to suspected ones. If you have unexplained calf swelling, warmth, or pain, using a massage gun on that leg before getting it checked is one of the riskier things you could do.

People on blood thinners deserve extra caution for a different reason. Anticoagulant medications reduce the blood’s ability to clot, which makes you more susceptible to bleeding from any mechanical trauma. In one documented case, a man hospitalized with COVID-19 complications, including bilateral deep vein thromboses in his legs, used a Theragun repeatedly on his abdomen at the site where anticoagulant injections were being administered. He developed a massive hematoma in his abdominal wall, measuring 14 by 17 cm, along with a pelvic hematoma that caused obstructive kidney problems.⁶ His situation was unusual, involving COVID-related illness, anticoagulation, obesity, and repeated aggressive use of a percussion device on compromised tissue. But it illustrates how the combination of blood thinners and percussive force can turn a device intended for muscle relief into something genuinely dangerous.

Tissue Damage That Does Not Involve Clots Directly

Blood clots are not the only vascular concern with aggressive massage gun use. One reported complication is rhabdomyolysis, a condition where muscle fibers break down and release their contents into the bloodstream. A case report documented a woman who developed rhabdomyolysis after using a percussion massage gun. Her coagulation markers, including prothrombin time and activated partial thromboplastin time, remained normal throughout her hospitalization, which means the massage gun did not directly cause a clotting problem in that instance.⁷ Rhabdomyolysis can strain the kidneys and cause electrolyte imbalances, but the clotting system may remain intact even when the muscles take a serious hit.

The systematic review literature also mentions blood vessel dissections and internal bleeding as potential outcomes of repeated, aggressive, prolonged use on the same area, particularly sessions exceeding 30 minutes.⁵ A dissection means the inner lining of an artery or vein tears, which can create the conditions for a clot to form at the injury site even if no clot existed beforehand. Vertebral artery dissection has been reported as a consequence of various neck manipulation techniques, and percussive massage devices applied to the neck carry a similar risk profile.

The Knowledge Gap for Home Users

One underappreciated part of this whole picture is that massage guns are consumer products sold without gatekeeping. When a physical therapist uses percussive therapy, they understand the anatomy beneath the skin, know where the major vessels run, and screen for contraindications before touching a patient. Home users generally have none of that background. A qualitative analysis of consumer perceptions of percussive massage therapy found that users may lack essential medical knowledge about underlying anatomical structures, including tissue, bones, and blood vessels, and may not understand how the device could interact with their own health conditions.⁸

This matters practically because the most dangerous scenarios are ones where the user would have no way of knowing they are at risk without prior medical evaluation. You cannot feel whether you have atherosclerotic plaque building up in your carotid arteries. A deep vein thrombosis sometimes presents with obvious symptoms like swelling and warmth, but it can also be completely silent. A person on anticoagulants may understand their medication in general terms but not realize that percussive force at an injection site multiplies the bleeding risk at that spot.

Device manufacturers typically include warnings in their manuals advising against use over areas with known blood clots, varicose veins, or recent injuries. But those warnings are easy to skip past, and they assume the user already knows their own medical status, which is a big assumption.

Where Massage Guns Are and Are Not Safe

The risk profile varies dramatically depending on where on the body you use the device. Large muscle groups like the quadriceps, hamstrings, glutes, and upper back are relatively safe zones for most people. These areas have thick muscle layers between the skin and the major blood vessels, and the vessels themselves tend to be deeper and better protected. The studies showing beneficial increases in blood flow and muscle oxygen saturation were conducted on exactly these kinds of sites.

The areas that consistently appear in injury reports and expert warnings include:

• The neck: carotid and vertebral arteries sit just below the surface, and percussive force can rupture plaques or injure vessel walls.
• The inner thigh and behind the knee: the femoral and popliteal vessels are relatively superficial here, and the popliteal fossa (the soft area behind your knee) is especially vulnerable.
• The abdomen: thinner muscle coverage and proximity to abdominal vasculature increase risk, particularly for people on anticoagulants.
• Any area with known varicose veins: weakened vessel walls are more susceptible to trauma.
• Over bony prominences and joints: less about clot risk and more about nerve and tissue damage, but still worth avoiding.

Duration and intensity also matter. Using a massage gun on your quadriceps for 30 to 60 seconds at moderate intensity is a fundamentally different exposure than grinding a device into one spot for 10 or 20 minutes. The case reports that document serious injury tend to involve either anatomically risky locations, prolonged or aggressive use, or patients with pre-existing conditions that made them vulnerable.

How Common Are These Events, Really?

It is worth stepping back and acknowledging that massage guns are extraordinarily popular consumer devices. Millions of units have been sold worldwide, and the number of published case reports linking them to blood clots, stroke, or other serious vascular events is in the single digits. That does not mean the risk is zero, but it does mean the absolute risk for a healthy person using the device on large muscle groups at reasonable intensity is very low.

The evidence that exists is almost entirely from individual case reports, not from large studies designed to measure incidence. Case reports are valuable because they identify hazards that would otherwise go unrecognized, but they cannot tell you how likely an event is. For every published case of massage-related carotid thrombosis, there could be unreported cases, or there could be millions of safe neck-massage sessions that nobody wrote a paper about. The honest answer is that we do not have good population-level data on the frequency of these events.

What the case reports do tell us is that the risk is not distributed evenly. It clusters around specific anatomical sites, specific pre-existing conditions, and specific patterns of aggressive or prolonged use. A healthy 30-year-old using a massage gun on sore quads after a workout occupies a very different risk category than a 79-year-old with undiagnosed carotid artery disease using a massager on the side of the neck every evening.

What Happens If You Suspect a Problem

If you develop symptoms after using a massage gun that suggest something beyond normal soreness, the response depends on the symptoms. New swelling, warmth, or persistent pain in one limb, especially a calf, could point to a deep vein thrombosis and warrants urgent medical evaluation. Sudden weakness, numbness, difficulty speaking, or vision changes after neck massage are stroke symptoms and require emergency care. Unusually dark urine after aggressive muscle treatment could indicate rhabdomyolysis.

Normal post-massage-gun soreness should feel like mild muscle tenderness, similar to what you get after a workout. It should not involve sharp pain, swelling that worsens over hours, skin color changes, or any neurological symptoms. The threshold for seeking help is lower than most people think, particularly if you have been working on an area near major blood vessels.

Conditions That Change the Calculus

Some conditions shift massage gun use from “low risk” to “genuinely inadvisable” even on otherwise safe body areas. These include active deep vein thrombosis or a recent history of DVT, use of anticoagulant medications like warfarin or the newer direct oral anticoagulants, known peripheral artery disease, recent surgery especially involving blood vessels, and bleeding disorders. Pregnant women are also typically advised to avoid percussive massage devices, as are people with certain cancers or tumors where increased blood flow to the area could be problematic.

People with atherosclerosis may not know they have it, which is part of what makes the neck cases so unsettling. Atherosclerotic plaques build up silently over decades. A person might feel perfectly healthy and have significant plaque in the carotid arteries. The 49-year-old woman in the case report discussed earlier had no diagnosed cardiovascular risk factors at all. Her carotid thrombosis developed from the mechanical insult of the neck massager alone. This does not mean everyone who massages their neck is in danger, but it does mean that age and cardiovascular risk factors deserve consideration when deciding where to use a percussive device.

If you have any of the conditions listed above, a conversation with your doctor before using a massage gun is a reasonable step. For everyone else, the practical guidance is simpler: stick to large muscle groups, keep sessions brief on any single area, avoid the neck entirely unless a qualified professional says otherwise, and pay attention to anything that feels like more than normal soreness afterward.