Can cupping lead to blood clots?

 Ever noticed those deep purple circles on someone’s back after a cupping session and thought, “That looks painful — is it safe?” It’s a fair question. Cupping has surged in popularity across Australia, from physiotherapy clinics in Melbourne to wellness studios in Vancouver and beyond. But as more people turn to it for pain relief and recovery, one concern quietly bubbles up: can cupping lead to blood clots?

Let’s separate the myths from the medical facts — without fearmongering, and with a good dose of science and common sense.

What Is Cupping Therapy, Really?

Cupping therapy is an ancient healing practice, found in Traditional Chinese Medicine (TCM) and Middle Eastern cultures. It involves placing heated glass, silicone, or plastic cups on the skin to create suction. This suction gently lifts the tissue, increasing blood flow to the area.

The result? A deep bruise-like mark that many people mistake for injury, but in most cases, it’s simply pooled blood from increased circulation — not internal bleeding or trauma.

Australian physiotherapist Dr. Michelle Wong explains, “Those marks look dramatic, but they’re more like hickeys than haemorrhages. They’re signs of increased vascular response, not damage.”

Can Cupping Cause Blood Clots?

The short answer: it’s extremely rare.
However, there are a few nuances worth understanding.

Cupping, by design, draws blood to the surface of the skin. This increased microcirculation can help with muscle tension and recovery. But because the suction doesn’t damage major blood vessels or affect deeper veins, it generally doesn’t create the conditions necessary for a blood clot to form.

A blood clot — or thrombosis — usually forms inside a vein due to slow circulation, vein injury, or clotting disorders. Cupping affects the skin and superficial capillaries, not deep veins.

Still, experts caution that those with existing clotting disorders, varicose veins, or who are on blood thinners should consult a doctor before trying cupping.

“It’s not the cupping itself that causes a problem — it’s when pre-existing conditions aren’t considered,” says Dr. Andrew Patel, a sports medicine specialist at the University of Sydney.

How Cupping Works: The Science Behind the Marks

The marks that appear after cupping are technically ecchymoses, caused by tiny capillaries breaking under pressure. The body treats this as a mild injury and sends immune cells to repair it, which may explain why many users report feeling looser or less sore afterward.

This process is part of the body’s natural inflammatory response, not a sign of danger. In fact, it’s similar to what happens when you roll out sore muscles with a foam roller or get a deep-tissue massage.

Here’s what typically happens beneath the skin:

  1. Suction draws blood to the surface, expanding small vessels.

  2. Oxygen-rich blood floods the area, delivering nutrients and removing waste.

  3. Lymphatic drainage improves, potentially reducing inflammation.

  4. Over 48–72 hours, the body clears the pooled blood, fading the marks.

Could Cupping Dislodge an Existing Clot?

This is the concern that causes most anxiety — and it’s not unfounded. If someone already has a deep vein thrombosis (DVT), strong suction over that area could, in theory, aggravate it. That’s why most certified therapists avoid cupping over:

  • The inner thigh (where major veins lie)

  • Swollen or inflamed skin

  • Areas with varicose veins or known vascular issues

When performed correctly, by a trained practitioner, cupping should never be applied over deep veins or clots. The key risk lies in self-treatment or unqualified providers who don’t understand anatomy.

In Australia, the Association of Massage Therapists recommends only certified practitioners perform cupping on people with cardiovascular conditions.

Why Some People Bruise More Than Others

Not all cupping marks are created equal. Some people walk away with light pink circles; others look like they’ve tangled with a squid. Why?

It depends on factors like:

  • Skin thickness and hydration

  • Circulatory health

  • Intensity and duration of suction

  • Individual sensitivity

People with fragile capillaries or blood-thinning medications may bruise more easily. This doesn’t mean cupping is unsafe for everyone — just that technique and duration need adjusting.

Cupping and Recovery: What Studies Show

While cupping has been used for thousands of years, modern evidence is still emerging. A 2018 BMJ Open review found that cupping therapy showed moderate benefits for chronic pain and muscle stiffness, though it called for larger trials to confirm long-term effects.

Interestingly, studies using wet cupping (where small skin pricks are made to release tiny amounts of blood) showed improved circulation and reduced inflammation markers — again, not clot formation.

Sports professionals often use dry cupping (no bloodletting), which is considered safe when done correctly. Elite athletes like Michael Phelps have popularised it, crediting cupping with faster recovery times and reduced muscle soreness.

When You Should Avoid Cupping

Cupping isn’t suitable for everyone. Avoid or postpone treatment if you:

  • Are on anticoagulant or clot-prevention medication

  • Have deep vein thrombosis (DVT)

  • Suffer from varicose veins or vascular fragility

  • Are pregnant (especially over the abdomen or lower back)

  • Have open wounds or active skin infections

These precautions aren’t about fear — they’re about informed care. A good practitioner will always screen for these risks before starting.

Real-World Example: A Case Study from a Vancouver Clinic

A Vancouver physiotherapy clinic reported a patient, age 52, who came in for back pain relief using cupping therapy. The patient was on low-dose aspirin and had mild varicose veins. Instead of full suction, the practitioner used a gentle, moving cupping technique — sliding the cups lightly to stimulate circulation without leaving deep marks.

The result? Noticeable pain relief after two sessions and no clotting or adverse reaction. This reflects what research and clinical experience consistently show: when tailored properly, cupping can be both safe and beneficial.

What You Might Be Feeling After a Session

After cupping, it’s normal to feel:

  • Warmth or mild tingling in the treated area

  • Temporary marks that fade within a week

  • Slight fatigue or lightheadedness (especially after the first session)

These are short-term responses to improved circulation — not warning signs. Staying hydrated and resting after treatment helps your body process the effects more smoothly.

Common Misconceptions About Cupping

Myth 1: Cupping causes blood clots.
Fact: It increases surface circulation but does not affect deep veins where clots form.

Myth 2: The darker the mark, the worse your toxins.
Fact: Cupping doesn’t “suck out toxins.” The marks reflect blood flow and pressure, not toxicity levels.

Myth 3: It’s an outdated folk therapy.
Fact: Many physiotherapists and sports medicine experts integrate cupping alongside modern rehab techniques — especially for athletes.

Safety Tips for a Better Experience

To minimise any potential risks, here’s what you can do:

  • Choose a qualified practitioner. Check for certification in cupping or TCM.

  • Communicate health conditions. Always disclose if you’re taking blood thinners or have clotting issues.

  • Start gently. Ask for shorter sessions or lighter suction if you’re new.

  • Avoid post-cupping heat. Skip hot baths or saunas for 24 hours.

  • Hydrate. It helps your body flush metabolic by-products efficiently.

These simple steps can make the difference between a safe, rejuvenating experience and a bruised back that leaves you wondering.

Final Word: Risk vs. Reward

Cupping therapy isn’t dangerous in itself — but like any body treatment, it requires knowledge and care. Blood clots from cupping are exceptionally rare, especially when done professionally. The therapy’s main action stays close to the skin, not the deep veins where clots form.

So, can cupping lead to blood clots?
Only in extremely rare cases involving pre-existing conditions or untrained practitioners. For the vast majority, it’s a safe, centuries-old method of promoting relaxation and recovery.

If you’re curious about what really happens inside your body during cupping — including how it affects circulation, toxins, and healing — this guide on cupping therapy in Vancouver explores the topic in more depth.

For clinical research and guidelines on safe complementary therapies, see Australian Health Practitioner Regulation Agency .

FAQs

Does cupping therapy hurt?
It shouldn’t. You’ll feel a pulling sensation, but not pain. If it hurts, the suction is likely too strong.

How long do cupping marks last?
Usually 3–7 days. They fade as your body reabsorbs the pooled blood.

Can I do cupping at home?
DIY kits exist, but it’s best to start with a qualified therapist who understands anatomy and safety precautions.

The bottom line: when used mindfully and professionally, cupping therapy can be a safe complement to modern wellness routines — one that boosts circulation, relieves tension, and does not cause blood clots.

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