World Thrombosis Day

World Thrombosis Day From Head to Toe, Take Control. World Thrombosis Day is a global campaign of the ISTH that raises awareness of thrombosis on Oct. 13.
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Celebrated year round, World Thrombosis Day (WTD) is recognized on 13 October. WTD focuses attention on the often overlooked and misunderstood disease of thrombosis. With thousands of educational events in countries around the world, WTD and its partners place a global spotlight on thrombosis as an urgent and growing health problem. Bringing together communities around the world to , the quiet, underlying disorder that is the common mechanism of the world’s three top cardiovascular killers – heart attack, stroke and venous thromboembolism (VTE) – the International Society on Thrombosis and Haemostasis (ISTH) launched WTD in 2014. Partnering with thrombosis societies from every continent of the world, the ISTH teams up with continental cardiovascular, neurology and hematology organizations in the effort to educate the public, health care professionals and policy makers about thrombosis risks, prevention and treatment. More than 5,000 partners from every continent of the world have pledged their support to WTD, with more joining every day. For a list of those organizations and for those interested in making the pledge and joining the effort, visit www.worldthrombosisday.org. We invite you to participate! To join the movement now, visit: www.worldthrombosisday.org/join/. Supporter Disclosure: The WTD campaign is supported by the following organizations: BMS/Pfizer Alliance, Bayer, Cardinal Health, Inari Medical, Leo Pharma, Roche, AstraZeneca, Penumbra, Regeneron, Total CME, Urban Emu and Viatris

Photo Disclaimer: If you submit a photo through the WTD website or social media pages, you grant permission for the campaign to share the submitted photo on its website and/or in its yearly impact report. The campaign maintains all rights to images as they relate to the campaign, any distribution or use thereof. The campaign is not legally liable for any reproduction of images. If you have questions or wish to remove a photo, email us at wtd@isth.org.

Led by the ISTH. Powered by you. World Thrombosis Day is a campaign of the , uniting the world's leading experts to educ...
03/09/2026

Led by the ISTH. Powered by you. World Thrombosis Day is a campaign of the , uniting the world's leading experts to educate about blood clots. This year, women's health takes center stage. Join the global campaign at https://bit.ly/JoinWTD.

03/08/2026

Managing blood clots can be complicated. While blood thinners are commonly used, some patients may be evaluated for additional treatment approaches, including mechanical thrombectomy.

Visit getouttheclot.com to learn more about blood clots and management options.

This International Women’s Day, your story could help save another woman’s life. Blood clots affect women in unique ways...
03/07/2026

This International Women’s Day, your story could help save another woman’s life. Blood clots affect women in unique ways, yet many women don’t recognize the signs of deep vein thrombosis (DVT) or pulmonary embolism (PE) until it’s too late. By sharing your experience, you can help others recognize symptoms sooner and feel less alone in their journey.

That's why we're introducing : a new storytelling initiative from World Thrombosis Day designed specifically to capture the experiences of women who have navigated a blood clot.

Every story becomes part of a global library of lived experiences reaching women in 190+ countries. You don’t need to be a medical expert. You just need to share what happened to you.

💬 Submit your today and help protect another woman’s life: https://bit.ly/4b6xt5h

03/06/2026

𝗠𝗮𝗿𝗰𝗵 𝗶𝘀 𝗡𝗮𝘁𝗶𝗼𝗻𝗮𝗹 𝗞𝗶𝗱𝗻𝗲𝘆 𝗠𝗼𝗻𝘁𝗵 💚🩺 — a good time to shine a light on how antiphospholipid syndrome (APS) can affect the kidneys.

Kidney involvement in APS was once under-recognised, but we now know it’s 𝗻𝗼𝘁 𝘂𝗻𝗰𝗼𝗺𝗺𝗼𝗻 and can sometimes be the 𝗳𝗶𝗿𝘀𝘁 (𝗮𝗻𝗱 𝗼𝗻𝗹𝘆) 𝘀𝗶𝗴𝗻 of APS. Early detection can make a real difference.

APS can affect the kidneys in a few ways, including:
• Clots in renal arteries or veins (which can cause high blood pressure, abdominal/back pain, and sometimes kidney damage)
• Narrowing of kidney arteries (renal artery stenosis), which can reduce blood flow and impact kidney function
• Tiny clots in small kidney vessels (thrombotic microangiopathy), which can affect platelets and kidney function

📚 𝗡𝗲𝘄 𝘀𝘁𝘂𝗱𝘆 𝘀𝗽𝗼𝘁𝗹𝗶𝗴𝗵𝘁: A 2025 case-based review highlights a 𝗿𝗮𝗿𝗲 𝗯𝘂𝘁 𝘀𝗲𝗿𝗶𝗼𝘂𝘀 𝗔𝗣𝗦-𝗿𝗲𝗹𝗮𝘁𝗲𝗱 𝗰𝗼𝗺𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 — 𝗮𝗱𝗿𝗲𝗻𝗮𝗹 𝗳𝗮𝗶𝗹𝘂𝗿𝗲 (𝗽𝗿𝗶𝗺𝗮𝗿𝘆 𝗮𝗱𝗿𝗲𝗻𝗮𝗹 𝗶𝗻𝘀𝘂𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝗰𝘆) — usually linked to clotting/bleeding affecting the adrenal glands. It’s a reminder that APS can involve multiple organs and why staying alert to unusual symptoms matters.

👉 𝗟𝗶𝗻𝗸 𝗶𝗻 𝘁𝗵𝗲 𝗰𝗼𝗺𝗺𝗲𝗻𝘁𝘀 (as always, please discuss personal symptoms or concerns with your GP/specialist).

03/06/2026

Know the signs of deep vein thrombosis (DVT). A deep vein thrombosis is a blood clot that typically forms in a deep vein in the leg (or arm). Recognizing the symptoms early can help prevent life-threatening complications.

Signs of DVT might include:
• Swelling in the leg or arm
• Pain or tenderness not caused by an injury (and sometimes feels like a severe cramp)
• Warmth or temperature changes in the affected limb
• Red or discolored skin

Symptoms can develop gradually or suddenly. If you notice these signs, it is important to seek medical attention.

Awareness matters. Knowing the signs could help save a life.

At every age. At every stage. From the first birth control prescription to the postpartum period to menopause, women fac...
03/06/2026

At every age. At every stage. From the first birth control prescription to the postpartum period to menopause, women face unique blood clot risks at every stage of life. This October 13, World Thrombosis Day 2026 is putting women's health front and center.

Get the facts at WorldThrombosisDay.org.

Every woman. Every community. Everywhere. Blood clots are the third most common cardiovascular condition worldwide and t...
03/04/2026

Every woman. Every community. Everywhere. Blood clots are the third most common cardiovascular condition worldwide and they do not discriminate. World Thrombosis Day 2026 is committed to reaching women in every community with life-saving education. Spread the word at https://bit.ly/WTDWomen.

A rare clotting disorder does not always look rare. It can look like a DVT. A pulmonary embolism. An unexplained miscarr...
02/28/2026

A rare clotting disorder does not always look rare. It can look like a DVT. A pulmonary embolism. An unexplained miscarriage. Know the signs. Ask the questions.

Rare Disease Day is a reminder that blood clots are not always straightforward. Rare clotting disorders like antiphospho...
02/27/2026

Rare Disease Day is a reminder that blood clots are not always straightforward. Rare clotting disorders like antiphospholipid syndrome and hereditary thrombophilia affect millions who often wait years for answers. More than you can imagine.

World Thrombosis Day and the ISTH proudly support tomorrow.

We're back with another pop quiz! Did you guess correctly? Find out below ⬇️💡TRUE! A person with a family history of ven...
02/26/2026

We're back with another pop quiz! Did you guess correctly? Find out below ⬇️

💡TRUE! A person with a family history of venous blood clots is at a higher risk for having a blood clot, potentially due to inherited disorders that affect blood, making it more prone to clot.

Learn more: https://bit.ly/4oaO6Tp

02/25/2026

Did you know blood clots can happen in the arms? Upper extremity DVT occurs when a blood clot forms in a vein of the arm. This can happen when veins are pressed on, blocked, or damaged as they pass through the shoulder area.

💙 Watch for swelling, pain, or discoloration in the arm
💙 Talk to your healthcare provider if something feels off
💙 Early diagnosis makes a difference

Learn more: https://bit.ly/45KzeU5

Here’s some good news: many blood clots can be prevented.Knowing your risk, asking questions, and following your care pl...
02/24/2026

Here’s some good news: many blood clots can be prevented.

Knowing your risk, asking questions, and following your care plan can make a real difference.

💙 Stay active when you can
💙 Take medications as prescribed
💙 Ask about your blood clot risk — especially during hospital stays
💙 Learn the signs and speak up if something doesn’t feel right

Prevention starts with awareness and you have a role in protecting your health! Learn more: worldthrombosisday.org

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