Understanding Total Bilirubin: What It Means When Your Blood Test is Abnormal
In my clinical practice, one of the more common concerns I see from patients is an “elevated bilirubin” result on a routine blood test. Many patients feel anxious when they notice this because it is often associated with jaundice or liver disease.
Total bilirubin is a substance produced when the body breaks down old red blood cells. The liver normally processes and removes it. When this process is disrupted, bilirubin levels may rise in the blood.
What is Total Bilirubin?
Total bilirubin is a measurement that includes both:
- Indirect (unconjugated) bilirubin– produced from red blood cell breakdown
- Direct (conjugated) bilirubin– processed by the liver and ready for excretion
A normal bilirubin level typically indicates that the liver is functioning well and red blood cell breakdown is balanced.
Common Causes of High Total Bilirubin
When I evaluate patients with raised bilirubin, I usually consider several possibilities:
Liver Conditions
Conditions such as hepatitis, fatty liver disease, or liver inflammation can affect how bilirubin is processed.
Blockage of Bile Ducts
Gallstones or bile duct obstruction may prevent bilirubin from being excreted properly.
Increased Red Blood Cell Breakdown
Conditions like hemolytic anemia increase bilirubin production beyond what the liver can handle.
Gilbert Syndrome (Common and Benign)
This is a harmless genetic condition where bilirubin levels rise .
Temporary Triggers
Dehydration, fasting, strenuous exercise, or infections and cancer ( liver , pancreatic ) can also cause mild increases.
Symptoms Associated with High Bilirubin
Not all patients experience symptoms, but when present, I often observe:
- Yellowing of the eyes or skin (jaundice)
- Dark urine
- Pale stools
- Fatigue or weakness
- Mild abdominal discomfort
The presence of symptoms often helps determine whether further investigation is needed.
When Should You Be Concerned?
In my clinical experience, a mild isolated increase without symptoms is often less concerning, especially in young adults. However, further evaluation is important if:
- Bilirubin levels are significantly elevated
- There is persistent jaundice
- Liver enzymes (ALT/AST) are also abnormal
- Symptoms such as abdominal pain or weight loss are present
How is It Diagnosed?
- Full liver function test (LFT)
- Complete blood count (CBC)
- Ultrasound of the liver and gallbladder
- Additional tests depending on the suspected cause
Can It Be Treated?
Treatment depends entirely on the underlying cause:
- Liver inflammation → lifestyle changes or medication
- Gallstones → medical or surgical management
- Hemolysis → treating the blood disorder
- Gilbert syndrome → usually no treatment needed
Doctor's Insight
In many cases, patients are surprised to learn that a mildly elevated bilirubin does not always indicate serious disease. However, it should never be ignored without proper context. The pattern of results and associated symptoms are just as important as the number itself.
– Dr. Balavendrian Anthony
Physician | Palliative Care
EvercareInternational Health Screening Centre
Medical Care Centre, Penang, Malaysia.
Frequently Asked Questions
Not always. It depends on the cause and severity.
Yes, especially in people with Gilbert syndrome.
Yellow eyes, fatigue, dark urine, and abdominal discomfort.
Often no treatment is needed, but evaluation is important.