High Bilirubin in Adults: What Causes It and When It Means Liver Trouble

High bilirubin in adults can raise questions and concerns. Bilirubin is a yellow pigment produced when red blood cells break down. Your liver processes and eliminates it. When bilirubin builds up, you may notice jaundice (yellowing of the skin or eyes) or other symptoms. Below, we explain the common causes, warning signs, and when to seek medical advice.

What Is Bilirubin?

• Bilirubin forms as hemoglobin from old red blood cells is broken down.
• It travels to the liver, where it’s converted (conjugated) so it can be excreted in bile.
• Normal total bilirubin in adults ranges from about 0.1 to 1.2 mg/dL.

Why Bilirubin Levels Rise

Elevated bilirubin in adults (hyperbilirubinemia) falls into three categories:

1. Pre-hepatic (Before the Liver)

   • Excessive breakdown of red blood cells (hemolysis)
   • Conditions: sickle cell disease, thalassemia, autoimmune hemolytic anemia
   • Lab: mainly “unconjugated” bilirubin is high

2. Hepatic (Within the Liver)

   • Liver cells can’t process or conjugate bilirubin properly
   • Causes:
     • Viral hepatitis (A, B, C)
     • Alcoholic liver disease
     • Non-alcoholic fatty liver disease (NAFLD)
     • Genetic disorders (Gilbert syndrome, Crigler–Najjar syndrome)
   • Lab: both unconjugated and conjugated bilirubin may rise

3. Post-hepatic (After the Liver)

   • Obstruction of bile ducts prevents bilirubin excretion
   • Causes:
     • Gallstones
     • Bile duct strictures
     • Pancreatic cancer
     • Cholangiocarcinoma
   • Lab: mainly “conjugated” bilirubin is elevated

Common Causes of High Bilirubin in Adults

• Gilbert Syndrome
  • A mild, inherited condition affecting bilirubin processing
  • Often discovered incidentally; rarely causes serious issues
• Hemolytic Anemias
  • Accelerated red blood cell breakdown overwhelms the liver
  • May present with fatigue, dark urine, and jaundice
• Viral Hepatitis
  • Inflammation of the liver by viruses leads to reduced bilirubin clearance
  • Symptoms may include nausea, abdominal pain, and fever
• Alcoholic Liver Disease
  • Chronic alcohol use damages liver cells
  • Can progress from fatty liver to cirrhosis
• Obstruction of Bile Flow
  • Gallstones or tumors block bile ducts
  • Causes intense itching, pale stools, and dark urine

Symptoms to Watch For

Mild elevations in bilirubin may cause almost no symptoms. More significant increases can result in:

• Yellowing of the skin and whites of the eyes (jaundice)
• Dark, tea-colored urine
• Pale, clay-colored stools
• Persistent itching (pruritus)
• Fatigue or weakness
• Abdominal pain (especially in the upper right side)
• Loss of appetite and weight loss

When High Bilirubin Means Liver Trouble

Not every case of high bilirubin in adults signals serious liver disease. However, you should pay close attention if you notice:

• Rapid onset or worsening of jaundice
• Severe abdominal pain, especially under the right rib cage
• High fever or chills (may indicate infection)
• Confusion, disorientation, or sleepiness
• Signs of advanced liver disease: easy bruising, swelling of the legs or abdomen

Red Flags Suggesting Serious Liver Involvement

• Total bilirubin above 3 mg/dL with worsening symptoms
• Elevated liver enzymes (ALT, AST, ALP) on blood tests
• Prolonged clotting times (INR) indicating poor liver synthetic function
• Imaging showing bile duct dilation or liver masses

Diagnosis: How Doctors Evaluate High Bilirubin

To pinpoint the cause of elevated bilirubin, your doctor may recommend:

• Blood Tests
  • Direct (conjugated) and indirect (unconjugated) bilirubin levels
  • Liver enzymes (ALT, AST, ALP, GGT)
  • Complete blood count (CBC) to check for anemia
  • Viral hepatitis panels
• Imaging
  • Ultrasound of the liver and gallbladder to detect obstructions
  • CT or MRI for detailed views of liver structure
• Genetic Testing
  • If Gilbert syndrome or other inherited conditions are suspected
• Liver Biopsy
  • In rare cases, to evaluate the extent of liver damage

Treatment Options

Treatment depends on the underlying cause of high bilirubin in adults:

• Supportive Care
  • Rest, hydration, and nutritional support
  • Avoiding alcohol and hepatotoxic drugs
• Medications
  • Antivirals for hepatitis B or C
  • Steroids or immunosuppressants for autoimmune hepatitis
  • Ursodeoxycholic acid for certain cholestatic liver diseases
• Procedures
  • Endoscopic removal of gallstones or stent placement in blocked bile ducts
  • Surgery to remove tumors or relieve obstructions
• Genetic Conditions
  • Often require no treatment (e.g., Gilbert syndrome)
  • Close monitoring during illness or stress

What You Can Do Right Now

1. Monitor your symptoms carefully.
2. Keep a record of any changes in urine color, stool color, itching, or pain.
3. Review your medications and supplements with a healthcare provider—some can affect liver function.
4. Consider a free, online symptom check, using the doctor approved Ubie Symptom Checker.
5. Maintain a balanced diet and moderate alcohol intake.

When to See a Doctor

Contact your healthcare provider if you experience:

• New or worsening jaundice
• Persistent abdominal pain or swelling
• Confusion, drowsiness, or other neurological changes
• Signs of infection: fever, chills, or severe discomfort

If you suspect something serious or life-threatening, do not delay. Early evaluation and treatment can prevent complications.

Speak to a doctor about any concerns, especially if symptoms are severe or progress rapidly. Your doctor can guide you through testing, diagnosis, and treatment options tailored to your needs.