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Bile Duct Diseases
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Digestive System

Bile Duct Diseases

Bile duct diseases involve blockages that disrupt the flow of digestive bile from the liver and gallbladder to the small intestine.

Overview

Your liver makes a digestive juice called bile. Your gallbladder stores it between meals. When you eat, your gallbladder pushes the bile into tubes called bile ducts. They carry the bile to your small intestine, where it helps break down fat and assists the liver in removing toxins and wastes.

Causes of Bile Duct Blockage

Different diseases can block the bile ducts and cause problems with the flow of bile, including:

  • Gallstones, which can increase pressure in the gallbladder and cause a gallbladder attack. The pain usually lasts from one to several hours.
  • Cancer
  • Infections
  • Birth defects, such as biliary atresia. This is the most common reason for liver transplants in children in the United States.
  • Inflammation, which can cause scarring. Over time, this can lead to liver failure.

Frequently Asked Questions

While some causes like genetic conditions or certain cancers cannot be prevented, you can reduce the risk of gallstone-related bile duct blockages by maintaining a healthy weight, eating a balanced diet low in saturated fats, and exercising regularly. Avoiding rapid weight loss is also important, as it can increase the likelihood of gallstone formation. Regular check-ups and managing conditions like diabetes can also help lower the risk of complications.
Doctors typically diagnose bile duct issues using a combination of blood tests and imaging. Blood tests can detect elevated bilirubin and liver enzymes, which indicate liver stress or blockage. Imaging tests such as an abdominal ultrasound, CT scan, or MRI (specifically MRCP) are used to visualize the bile ducts and identify obstructions like stones or strictures. In some cases, an endoscopic ultrasound may be performed for a more detailed view.
If left untreated, a bile duct blockage can lead to serious complications such as cholangitis (infection of the bile ducts), which can cause fever, chills, and severe pain. Over time, the backup of bile can damage the liver, leading to liver failure. In cases where the blockage is caused by cancer, delaying treatment can allow the disease to spread. Prompt medical intervention is essential to restore bile flow and prevent permanent organ damage.
The most common early signs of a bile duct blockage include jaundice (yellowing of the skin and eyes), dark urine, and pale or clay-colored stools. You may also experience itching all over the body due to bile salts building up in the skin. If you notice these symptoms, especially if they appear suddenly, seek medical evaluation promptly, as they indicate that bile is not flowing correctly into the intestine.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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