Hepatitis B is a virus that affects the liver. Some infections clear on their own, while others become long-term. Testing is the only reliable way to know your status, because many people have no symptoms.
This page provides general information and cannot replace personal medical advice, testing, or diagnosis. Do not buy, start, stop, share, or change medicine on your own.
How does hepatitis B spread?
The virus can spread through blood, semen, and certain other body fluids. Common routes include birth from a parent with hepatitis B, sex without a barrier method, sharing needles or injection equipment, and using unsterilized equipment for tattoos or piercings.
It does not usually spread through hugging, coughing, sharing food, or using the same toilet. Everyday contact is safe and people with hepatitis B should not be excluded or blamed.
What are the symptoms of hepatitis B?
Many people notice no symptoms. When symptoms occur, they may include tiredness, poor appetite, nausea, pain in the upper abdomen, dark urine, pale stool, or yellowing of the skin or eyes. These symptoms can have other causes, so a blood test is needed.
Seek urgent care for increasing yellowing with worsening illness, confusion, unusual sleepiness, vomiting blood, black stool, severe abdominal swelling, or severe pain. These signs do not always mean hepatitis B, but they need prompt assessment.
How is hepatitis B testing understood?
Hepatitis B testing can involve more than one blood marker. Together, the results may show whether someone is currently infected, had a past infection, or has protection from vaccination. One result by itself may not tell the whole story.
A clinic can explain the pattern and whether repeat testing, liver checks, or testing for hepatitis C and HIV would be useful. If a recent exposure is worrying you, contact a health service promptly because time-sensitive prevention may be available.
Can hepatitis B be treated?
There is no specific medicine that clears an acute hepatitis B infection, so care usually focuses on symptoms and monitoring. Long-term hepatitis B can be managed with antiviral medicine when treatment is appropriate. Treatment can reduce liver damage and the risk of complications, but it does not usually cure the infection.
Not everyone with long-term hepatitis B needs medicine immediately. A clinician considers blood results, the amount of virus, liver health, age, pregnancy, other conditions, and current medicines. Some people who start treatment need it for a long time, so never stop because you feel well or because one result improves.
How can hepatitis B be prevented?
- Check whether you have completed hepatitis B vaccination.
- Use condoms or other suitable barriers during sex.
- Do not share needles, injection equipment, razors, or toothbrushes.
- Choose tattoo and piercing services that use sterile equipment.
- Cover open cuts and clean blood spills safely.
- If pregnant, ask about hepatitis B testing and steps that protect the baby.
The hepatitis B vaccine is safe and effective, but it does not treat an infection that is already present. A health service can check your vaccination record and advise what is appropriate for you.
Read more about hepatitis C and HIV testing.
Frequently asked questions about hepatitis B
Can hepatitis B be cured?
Most adults with a new infection recover without it becoming long-term. For long-term hepatitis B, current medicines usually control rather than cure the virus. Regular monitoring remains important even when you feel well.
Can I get hepatitis B from sharing food?
No. Hepatitis B is not normally spread by sharing meals, cups, toilets, hugging, or coughing. It spreads when infected blood or certain body fluids enter another person's body.
Should family or partners be tested?
People who live with or have sex with someone who has hepatitis B can ask a health service about testing and vaccination. This is routine prevention and should be discussed without blame.
Does vaccination mean I never need a test?
Not always. If your vaccination history is unclear, you have had a possible exposure, or a clinician recommends testing, a blood test can help clarify your status and next steps.
Summary: hepatitis B
Hepatitis B can be short-term or long-term, and it often causes no early symptoms. Blood tests help explain your status. Vaccination prevents infection, while antiviral medicine can control long-term infection for people who need it. Use a health service for personal advice and never start or change treatment on your own.
