Biliary atresia is a rare liver condition that affects infants, where the bile ducts outside the liver are either absent or damaged. This blockage prevents bile, a fluid that helps digest fats, from flowing from the liver to the intestine. As a result, bile accumulates in the liver, leading to liver damage and other serious health issues. The exact cause of biliary atresia is unknown, but it is believed to occur during fetal development. Symptoms often appear within the first few weeks of life and may include jaundice, dark urine, and pale stools. Early diagnosis and treatment, such as surgery, are crucial for improving outcomes.