Elevated Bilirubin – Causes, Symptoms & Treatment
Elevated bilirubin occurs when bilirubin levels in the blood are too high, often causing jaundice. Common causes include liver disease, blood disorders, and bile duct obstruction.
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Elevated bilirubin occurs when bilirubin levels in the blood are too high, often causing jaundice. Common causes include liver disease, blood disorders, and bile duct obstruction.
What Is Elevated Bilirubin?
Bilirubin is a yellow-orange pigment produced when the body breaks down old red blood cells. It is processed by the liver, secreted into bile, and excreted through the stool. When bilirubin levels in the blood become too high, the condition is medically known as hyperbilirubinemia. If levels rise significantly, bilirubin accumulates in body tissues, causing the characteristic yellow discoloration of the skin and the whites of the eyes -- a condition called jaundice (icterus).
Causes
Elevated bilirubin can result from problems at different stages of bilirubin metabolism, which are grouped into three main categories:
Pre-hepatic Causes (before the liver)
- Hemolytic anemia: Excessive breakdown of red blood cells produces more bilirubin than the liver can process.
- Inherited conditions such as sickle cell disease or thalassemia
- Certain infections that cause red blood cell destruction
Hepatic Causes (within the liver)
- Hepatitis: Liver inflammation caused by viruses, alcohol, or medications
- Liver cirrhosis: Chronic scarring of liver tissue
- Liver cancer or metastases
- Gilbert syndrome: A benign, inherited condition affecting bilirubin processing
Post-hepatic Causes (after the liver)
- Gallstones: Blockage of the bile ducts
- Bile duct inflammation (cholangitis)
- Pancreatic cancer compressing the bile duct from outside
Symptoms
Mildly elevated bilirubin levels often cause no noticeable symptoms. When levels are significantly elevated, the following symptoms may occur:
- Yellowing of the skin and whites of the eyes (jaundice)
- Dark, brown-colored urine (due to bilirubin excretion via the kidneys)
- Pale or clay-colored stools (in cases of bile duct obstruction)
- Itching of the skin
- Fatigue and general malaise
- Pain in the upper right abdomen (depending on the cause)
Diagnosis
Elevated bilirubin is primarily diagnosed through a blood test. The test distinguishes between direct (conjugated) and indirect (unconjugated) bilirubin, which helps identify the underlying cause:
- Elevated indirect bilirubin suggests increased red blood cell breakdown or impaired liver uptake.
- Elevated direct bilirubin points to problems with bile excretion or a bile duct obstruction.
Additional diagnostic measures may include:
- Liver function tests (e.g., AST, ALT, GGT)
- Abdominal ultrasound
- CT or MRI imaging
- Liver biopsy in selected cases
Treatment
Treatment of elevated bilirubin always targets the underlying cause:
- Hepatitis: Antiviral medications for viral hepatitis; abstinence from alcohol for alcohol-related liver disease
- Gallstones: Endoscopic removal or surgical intervention
- Hemolytic anemia: Drug therapy or blood transfusions
- Gilbert syndrome: No treatment required, as the condition is harmless
- Neonatal jaundice: Phototherapy (light therapy) is a well-established treatment for elevated bilirubin in newborns
Supportive measures such as treating itchy skin or adjusting medications may also be helpful. Anyone who suspects elevated bilirubin should seek medical advice promptly.
References
- Herold, G. et al. - Internal Medicine. Self-published, Cologne, 2023.
- European Association for the Study of the Liver (EASL) - Clinical Practice Guidelines on the management of hepatitis B virus infection. Journal of Hepatology, 2017.
- Berk, P. D. & Korenblat, K. M. - Approach to the patient with jaundice or abnormal liver tests. In: Goldman's Cecil Medicine, 25th Edition, 2016.
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