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World Thrombosis Day 2026

Learn about World Thrombosis Day 2026, observed on October 13, to raise awareness of blood clots, their causes, symptoms, prevention, and treatment.

World Thrombosis Day is observed every year on 13 October to raise awareness about thrombosis, a condition in which blood clots form inside blood vessels and can block normal blood flow.

World Thrombosis Day – Important Facts

Date = 13 October
First observed = 2014
Initiative of = International Society on Thrombosis and Haemostasis (ISTH)
Main objective = To increase public awareness about the causes, risk factors, prevention and treatment of thrombosis.
Key focus = Venous thromboembolism (VTE), including deep vein thrombosis (DVT) and pulmonary embolism (PE).

World Thrombosis Day (WTD) is observed annually to raise awareness about thrombosis, a condition in which blood clots form inside blood vessels and may obstruct normal blood flow.
Significance of the Date = Commemorates the birth anniversary of Rudolf Virchow (born October 13, 1821), a German physician, pathologist, and anthropologist who pioneered the medical understanding of thrombosis and cellular pathology.

Theme of World Thrombosis Day 2026 = “Blood clot risk evolves across a woman’s lifespan.”
The 2026 campaign focuses on women’s health and highlights how blood clot risks can change during reproductive life, pregnancy, the postpartum period and menopause

Deep Vein Thrombosis (DVT) = Blood clot forms in a deep vein, usually in the leg.
Pulmonary Embolism (PE) = A clot blocks an artery in the lungs, often after travelling from a deep vein.
Arterial thrombosis = A clot forms in an artery and may cause a heart attack or ischaemic stroke.
Venous thromboembolism (VTE) = A condition encompassing DVT and PE.

Endothelial Injury / Vessel Wall Damage = Direct damage to the inner vascular lining (e.g., trauma, surgery, hypertension, catheterization).
Hemodynamic Changes (Stasis / Turbulence) = Sluggish or disrupted blood flow (e.g., prolonged immobility, long flights, bed rest post-surgery).
Hypercoagulability (Thrombophilia) = Altered blood composition favoring excessive clotting (e.g., genetic mutations like Factor V Leiden, malignancy, elevated estrogen from oral contraceptives/HRT)
World Thrombosis Day 2026

Maintain regular physical activity.
Avoid prolonged periods of sitting; move regularly during long journeys.
Follow medical advice about clot prevention before and after surgery.
Assess individual risk factors, especially during pregnancy and after childbirth.
World Thrombosis Day 2026

Anticoagulants (blood-thinning medicines) are commonly used to prevent clots from growing and reduce the risk of further clots.
Selected cases may require clot-dissolving medicines or procedures to remove the clot.

World Thrombosis Day = 13 October
First observed = 2014
Leading organisation = International Society on Thrombosis and Haemostasis (ISTH)
Why 13 October? = Birthday of Rudolf Virchow
Rudolf Virchow = German physician and pathologist associated with the development of the scientific understanding of thrombosis
DVT = Deep Vein Thrombosis
PE = Pulmonary Embolism
VTE = Venous Thromboembolism
2026 campaign focus = Women’s health and blood clot risks throughout life