What causes Budd-Chiari syndrome?

What causes Budd-Chiari syndrome?

Budd-Chiari syndrome can be caused by conditions and situations that cause your blood to clot (form a blockage). These include:

• Myeloproliferative diseases (those that affect the blood and bone marrow), including polycythemia (the body makes too many red blood cells), and thrombocythemia (the body produces too many platelets).
• Sickle cell disease (a blood disease in which red blood cells change shape from round to sickle-shaped).
• Inflammatory bowel disease (a group of disorders that cause irritation and swelling of the digestive tract).
• Pregnancy.