Learn the symptoms of blood clot in leg, including swelling, pain, and cyanosis. Know the warning signs and when to seek urgent care.

A rare but serious clotting disorder linked to certain COVID-19 vaccines and natural adenovirus infections has puzzled scientists for years.

People have been warned about the "potentially life-threatening" condition that affects thousands every year. Without ...

About the National Blood Clot Alliance: The National Blood Clot Alliance is the nation’s leading nonprofit voluntary health organization dedicated to advancing the prevention, early diagnosis, and ...

Catherine O’Hara’s death from a pulmonary embolism has drawn attention to this serious condition in which a blood clot lodges in the lungs. Dr. Leana Wen explains.

Researchers have identified the molecular mechanism behind vaccine-induced immune thrombotic thrombocytopenia, or VITT, a rare clotting disorder that emerged in a small number of people who received ...

Every year, millions of people develop dangerous blood clots in their legs without realizing the life-threatening risk growing within their bodies. These formations, medically known as deep vein ...

After years of work, scientists have solved the mystery of an unusual side effect that impacted some recipients of the Oxford ...

Rare but deadly blood clots tied to J&J and AstraZeneca's vaccines were caused by an autoimmune reaction that some people are predisposed to, researchers found.

Piróg M, Ząbczyk M, Natorska J, et al. Prothrombotic fibrin clot phenotype in obstetric antiphospholipid syndrome: clinical implications and unanswered questions. Authors’ reply. Pol Arch Intern Med.