What does a positive hepatitis B result mean?

A test may look for part of the virus, an antibody made after exposure, or an antibody made after vaccination. Some patterns suggest a current infection; others show previous exposure or protection. A single positive result cannot reliably distinguish these possibilities. Your clinician may compare several markers with liver-related blood tests and, when appropriate, repeat testing.

Many people have few or no symptoms. When symptoms occur, they can include fatigue, nausea, loss of appetite, yellowing of the skin or eyes, or dark urine. A positive marker is not the same as a measure of liver damage.

Arrange a follow-up appointment and take the full laboratory report with you. Ask which marker was positive, whether testing for other markers is needed, and whether a [Liver Function Test](/treatments/diagnostics-and-screening/liver-function-test/) is appropriate. Until the result is clarified, do not share razors or toothbrushes, and cover cuts. Discuss household and sexual contacts with a clinician; [Hepatitis B Vaccination](/treatments/preventive-care-and-vaccination/hepatitis-b-vaccination/) may be relevant for people who are not protected.

Seek urgent medical assessment for yellow skin or eyes, confusion, severe vomiting, unusual bleeding, marked drowsiness, or rapidly worsening abdominal swelling. Contact a clinician soon if persistent fatigue, dark urine, or poor appetite develops. These symptoms need assessment because they can signal liver or other illness; they do not by themselves prove hepatitis B.

Ask: Which hepatitis B marker was positive? Does the pattern indicate infection, past exposure, or vaccination response? Do I need repeat blood tests or liver monitoring? Should people in my household be tested or vaccinated? What medicines, supplements, or alcohol should I avoid while this is being clarified?