Budd–Chiari Syndrome (BCS) Is A Rare Disorder Caused By A Blockage Of The Veins In The Liver. It Occurs When The Hepatic Veins, Which Carry Blood From The Liver To The Heart, Become Blocked. This Prevents Blood From Flowing From The Liver, Leading To Liver Damage. Symptoms Of BCS Include Abdominal Pain, Swelling Of The Abdomen And Legs, Fatigue, Jaundice, And Sudden Weight Gain. BCS Can Be Caused By A Number Of Things, Including Blood Clots, Tumors, And Liver Diseases. It Can Also Be Caused By The Narrowing Of The Veins Due To Inflammation Or Scarring. Treatment Of BCS Depends On The Underlying Cause. If The Cause Is A Clot, It May Be Possible To Remove The Clot With A Procedure Called A Thrombectomy. If The Cause Is A Tumor, It May Require Surgery To Remove The Tumor. In Some Cases, Medications May Be Used To Reduce The Blockage In The Veins And Improve Blood Flow. In Addition, Lifestyle Changes, Such As Eating A Healthy Diet And Avoiding Alcohol, Can Help Reduce The Risk Of BCS. In Severe Cases, A Liver Transplant May Be Necessary. The Outlook For BCS Depends On The Underlying Cause And How It Is Treated. Early Diagnosis And Treatment Can Help Improve The Long-Term Outlook.