What a Positive Hepatitis B Titer Means

A titer is a laboratory measurement of an immune marker in blood. A positive result is not, by itself, a complete diagnosis of active hepatitis B or proof that infection is present now.

The hepatitis B panel may include markers that point to immunity after vaccination, immunity after an earlier infection, or a current infection. The result needs to be read alongside markers such as hepatitis B surface antigen and core antibody, rather than interpreted from the word positive alone.

If the positive marker is an antibody associated with protection, you may already have immunity and may not need another vaccine dose. If a marker suggests current infection, a clinician may arrange further blood tests and assess liver health. A positive antibody result does not establish when exposure occurred.

Many people have no symptoms. When symptoms occur, they can include tiredness, nausea, abdominal discomfort, or yellowing of the skin or eyes. Dark urine and fatigue can also occur, but these symptoms have many possible causes.

Ask for the exact name of the positive marker and a copy of the complete report. Tell the clinician whether you have received hepatitis B vaccination, had a previous hepatitis B diagnosis, or could have had a recent exposure.

A clinician may repeat or complete the hepatitis B panel and check liver-related blood tests. A [Liver Function Test](/treatments/diagnostics-and-screening/liver-function-test/) can help assess how the liver is working, but it does not identify the cause of every abnormal result.

Until the result is clarified, do not donate blood and avoid sharing razors, toothbrushes, or needles. Ask about protecting sexual partners and household contacts; vaccination can provide protection for people who are not immune. See [Hepatitis B Vaccination](/treatments/preventive-care-and-vaccination/hepatitis-b-vaccination/) for more information.

Arrange medical review promptly if a result may indicate current infection, especially after a recent exposure or if you are pregnant. Seek urgent care for yellow skin or eyes, severe vomiting, marked drowsiness, confusion, unusual bleeding, or severe abdominal pain.

Contact a clinician soon if you develop [Dark Urine](/symptoms/dark-urine/) or persistent [Fatigue](/symptoms/fatigue/). These symptoms do not confirm hepatitis B, but they deserve assessment when paired with an abnormal liver-related result.

Ask: Which hepatitis B marker was positive? Does the pattern suggest vaccination, past infection, or current infection? Do I need repeat tests or liver assessment? Should anyone close to me be tested or vaccinated? What precautions should I take while this is being clarified?

For background on the condition, read [Hepatitis B](/conditions/hepatitis-b/).