Biliary tract diseases refer to conditions affecting the bile ducts, gallbladder, and liver. These diseases can lead to blockages, inflammation, or infections, impacting the flow of bile, which is essential for digestion. Common examples include gallstones, cholecystitis, and cholangitis. Symptoms of biliary tract diseases may include abdominal pain, jaundice, and nausea. Diagnosis often involves imaging tests like ultrasound or CT scans, and treatment can range from medication to surgical procedures, depending on the severity and type of the disease. Early detection is crucial for effective management.