Budd–Chiari syndrome is a condition caused by occlusion of the hepatic veins that drain the liver. It presents with the classical triad of abdominal pain, ascites, and liver enlargement. The formation of a blood clot within the hepatic veins can lead to Budd–Chiari syndrome. It occurs in 1 out of a million individuals. The syndrome can be fulminant, acute, chronic, or asymptomatic.