Bilirubin is a yellow pigment formed when red blood cells break down. The liver processes bilirubin and excretes it through bile into the intestines. When this process slows or becomes blocked, bilirubin can build up in the blood, sometimes leading to visible jaundice (yellowing of the skin and eyes).
Is slightly high bilirubin serious?
Mild elevations can be harmless, especially in people with Gilbert syndrome or after fasting or recent illness. If bilirubin stays high or rises, your clinician may review liver enzymes and bile-duct markers for a fuller picture.
What bilirubin level is considered high?
Each lab sets its own range, but total bilirubin above about 1.2 mg/dL (20 µmol/L) is usually considered elevated. Levels above 2–3 mg/dL are more likely to cause symptoms such as jaundice and deserve timely evaluation.
Can high bilirubin go back to normal?
Yes. Bilirubin often returns to normal after hydration, recovery from illness, or treatment of underlying causes such as gallstones or liver inflammation. Trends and repeat testing help determine whether the elevation is temporary.
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