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Hepatitis B
URL of this page: https://medlineplus.gov/hepatitisb.html

Hepatitis B

Also called: HBV
On this page

Basics

  • Summary
  • Start Here
  • Diagnosis and Tests
  • Prevention and Risk Factors
  • Treatments and Therapies

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  • Related Issues

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Summary

What is hepatitis?

Hepatitis is inflammation of the liver. Inflammation is swelling that happens when tissues of the body are injured or infected. It can damage your liver. This swelling and damage can affect how well your liver functions.

What is hepatitis B?

Hepatitis B is a type of viral hepatitis. It can cause an acute (short-term) or chronic (long-term) infection. People with an acute infection usually get better on their own without treatment. Some people with chronic hepatitis B will need treatment.

Thanks to a vaccine, hepatitis B is not very common in the United States. It is more common in certain parts of the world, such as sub-Saharan Africa and parts of Asia.

What causes hepatitis B?

Hepatitis B is caused by the hepatitis B virus. The virus spreads through contact with blood, semen, or other body fluids from a person who has the virus.

Who is at risk for hepatitis B?

Anyone can get hepatitis B, but the risk is higher in:

  • Infants born to mothers who have hepatitis B
  • People who inject drugs or share needles, syringes, and other types of drug equipment
  • Sex partners of people with hepatitis B, especially if they are not using latex or polyurethane condoms during sex
  • Men who have sex with men
  • People who live with someone who has hepatitis B, especially if they use the same razor, toothbrush, or nail clippers
  • Health care and public-safety workers who are exposed to blood on the job
  • Hemodialysis patients
  • People who have lived in or traveled often to parts of the world where hepatitis B is common
  • People who have diabetes, hepatitis C, or HIV

What are the symptoms of hepatitis B?

Often, people with hepatitis B don't have symptoms. Adults and children over 5 are more likely to have symptoms than younger children.

Some people with acute hepatitis B have symptoms 2 to 5 months after infection. These symptoms can include:

  • Dark yellow urine
  • Diarrhea
  • Fatigue
  • Fever
  • Gray- or clay-colored stools
  • Joint pain
  • Loss of appetite
  • Nausea and/or vomiting
  • Abdominal pain
  • Yellowish eyes and skin, called jaundice

If you have chronic hepatitis B, you may not have symptoms until complications develop. This could be decades after you were infected. For this reason, hepatitis B screening is important, even if you have no symptoms. Screening means that you are tested for a disease even though you don't have symptoms. If you are at high risk, your health care provider may suggest screening.

What other problems can hepatitis B cause?

In rare cases, acute hepatitis B can cause liver failure.

Chronic hepatitis B can develop into a serious disease that causes long-term health problems such as cirrhosis (scarring of the liver), liver cancer, and liver failure.

If you have ever had hepatitis B, the virus may become active again, or reactivated, later in life. This could start to damage the liver and cause symptoms.

How is hepatitis B diagnosed?

To diagnose hepatitis B, your health care provider may use many tools to make a diagnosis:

  • A medical history, which includes asking about your symptoms
  • A physical exam
  • Blood tests, including tests for viral hepatitis

What are the treatments for hepatitis B?

If you have acute hepatitis B, you probably don't need treatment. Some people with chronic hepatitis B don't need treatment. But if you have a chronic infection and blood tests show that hepatitis B could be damaging your liver, you may need to take antiviral medicines.

Can hepatitis B be prevented?

The best way to prevent hepatitis B is to get the hepatitis B vaccine.

You can also reduce your chance of hepatitis B infection by:

  • Not sharing drug needles or other drug materials
  • Wearing gloves if you have to touch another person's blood or open sores
  • Making sure your tattoo artist or body piercer uses sterile tools
  • Not sharing personal items, such as toothbrushes, razors, or nail clippers
  • Using a latex condom during sex. If your or your partner is allergic to latex, you can use polyurethane condoms.

If you think you have been in contact with the hepatitis B virus, see your health care provider right away. Your provider may give you a dose of the hepatitis B vaccine to prevent infection. In some cases, your provider may also give you a medicine called hepatitis B immune globulin (HBIG). You need to get the vaccine and the HBIG (if needed) as soon as possible after coming into contact with the virus. It is best if you can get them within 24 hours.

National Institute of Diabetes and Digestive and Kidney Diseases

Start Here

  • Hepatitis B (American Academy of Family Physicians) Also in Spanish
  • Hepatitis B From the National Institutes of Health Easy-to-Read (National Institute of Diabetes and Digestive and Kidney Diseases) Also in Spanish
  • Hepatitis B Basics (Centers for Disease Control and Prevention)
  • Hepatitis B Prevention and Control (Centers for Disease Control and Prevention)
  • Hepatitis B: Patient's Guide (Department of Veterans Affairs)

Diagnosis and Tests

  • Hepatitis Panel From the National Institutes of Health (National Library of Medicine) Also in Spanish
  • Liver Function Tests From the National Institutes of Health (National Library of Medicine) Also in Spanish

Prevention and Risk Factors

  • Hepatitis B Vaccine Safety (Centers for Disease Control and Prevention)
  • Hepatitis B Vaccine: What You Need to Know (Centers for Disease Control and Prevention) - PDF
  • Prevention Tips for Hepatitis B (Hepatitis B Foundation)

Treatments and Therapies

  • Approved Drugs for Adults (Hepatitis B Foundation)
  • Treatment Options for Hepatitis B (Hepatitis B Foundation)

Living With

  • Adults Living with Hepatitis B (Hepatitis B Foundation)

Related Issues

  • Hepatitis D From the National Institutes of Health Easy-to-Read (National Institute of Diabetes and Digestive and Kidney Diseases)
  • HIV and Hepatitis B From the National Institutes of Health (National Institutes of Health, Office of AIDS Research) Also in Spanish
  • HIV and Hepatitis B and Hepatitis C Coinfection From the National Institutes of Health (HIV.gov; National Institutes of Health, Office of AIDS Research)
  • Infectious Diseases in Persons Who Inject Drugs (Centers for Disease Control and Prevention)
  • Know HBV: What Every Asian and Pacific Islander Should Know About Hepatitis B and Liver Cancer (Asian Liver Center at Stanford University) - PDF

Statistics and Research

  • FastStats: Viral Hepatitis (National Center for Health Statistics)
  • Viral Hepatitis Surveillance Report: United States, 2020 (Centers for Disease Control and Prevention)

Clinical Trials

  • ClinicalTrials.gov: Hepatitis B From the National Institutes of Health (National Institutes of Health)

Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)

  • Article: Clinical differences between HBV and alcohol related ACLF in a WGO...
  • Article: Taking the opportunity of COVID testing to screen vulnerable populations for...
  • Article: Hepatitis B virus exposure among adolescents living with HIV: a cross-sectional...
  • Hepatitis B -- see more articles

Find an Expert

  • Centers for Disease Control and Prevention Also in Spanish
  • National Institute of Allergy and Infectious Diseases From the National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases From the National Institutes of Health

Children

  • Hepatitis (Nemours Foundation) Also in Spanish

Teenagers

  • Hepatitis B (Nemours Foundation) Also in Spanish

Men

  • Protect Yourself against Hepatitis A and B: A Guide for Gay and Bisexual Men (Immunization Action Coalition) - PDF Also in Spanish

Patient Handouts

  • Hepatitis B (Medical Encyclopedia) Also in Spanish
  • Hepatitis B From the National Institutes of Health Easy-to-Read (National Institute of Diabetes and Digestive and Kidney Diseases) Also in Spanish
  • Hepatitis B - children (Medical Encyclopedia) Also in Spanish
  • Hepatitis B Vaccine: What You Need to Know (Centers for Disease Control and Prevention) - PDF
  • Hepatitis virus panel (Medical Encyclopedia) Also in Spanish
  • Preventing hepatitis B or C (Medical Encyclopedia) Also in Spanish

Topic Image

Hepatitis B

MEDICAL ENCYCLOPEDIA

  • Gianotti-Crosti syndrome
  • Hepatitis B
  • Hepatitis B - children
  • Hepatitis D (Delta agent)
  • Hepatitis virus panel
  • Preventing hepatitis B or C

Related Health Topics

  • Hepatitis
  • Hepatitis A
  • Hepatitis C

National Institutes of Health

The primary NIH organization for research on Hepatitis B is the National Institute of Diabetes and Digestive and Kidney Diseases

Other Languages

Find health information in languages other than English on Hepatitis B

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The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health.

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