Hepatitis B Infection

What is Hepatitis B infection?

Hepatitis B infection is a viral disease that affects your liver. The Hepatitis B virus, also called HBV, attacks liver cells and causes inflammation. This inflammation can damage your liver over time.

Many people clear the virus naturally within six months, called an acute infection. However, some people cannot clear the virus and develop chronic Hepatitis B. Chronic infection means the virus stays in your body for life. It can lead to serious liver problems like cirrhosis or liver cancer.

Hepatitis B spreads through blood and body fluids. You can get it from an infected mother during birth, through sexual contact, or by sharing needles. The virus is much more contagious than HIV. About 300 million people worldwide live with chronic Hepatitis B.

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Symptoms

Common symptoms of Hepatitis B infection include:

Fatigue and weakness that lasts for weeks
Loss of appetite and nausea
Abdominal pain, especially in the upper right side
Dark urine that looks like tea or cola
Clay-colored or pale stools
Jaundice, which is yellowing of skin and eyes
Joint pain and muscle aches
Low-grade fever

Many people with chronic Hepatitis B have no symptoms for years or decades. The virus silently damages the liver during this time. Some people only discover their infection through routine blood work or when complications develop.

Causes and risk factors

Hepatitis B spreads through contact with infected blood or body fluids. The most common ways to get infected include birth from an infected mother, unprotected sex with an infected partner, and sharing needles or syringes. Healthcare workers can get exposed through needle stick injuries. Sharing personal items like razors or toothbrushes can also spread the virus if they have traces of blood.

Your risk increases if you live with someone who has Hepatitis B, have multiple sexual partners, use injection drugs, work in healthcare, or travel to areas where the virus is common. Babies born to infected mothers have a high risk of developing chronic infection. People with weakened immune systems from HIV or other conditions are also at greater risk. Getting a tattoo or piercing with unsterilized equipment can transmit the virus.

How it's diagnosed

Doctors diagnose Hepatitis B through blood tests that look for viral proteins and antibodies. The Hepatitis B surface antigen test shows if you currently have the virus. The Hepatitis Be antigen test indicates how active the infection is and how contagious you are. High levels of this marker mean the virus is multiplying rapidly. Doctors also check for antibodies to see if you have immunity from vaccination or past infection.

Additional tests measure your viral load, which is the amount of virus in your blood. Liver function tests check how well your liver is working. Your doctor may order imaging tests like an ultrasound or a liver biopsy to assess liver damage. Talk to your doctor about specialized testing for Hepatitis B if you have risk factors or symptoms.

Treatment options

Treatment for Hepatitis B depends on whether your infection is acute or chronic:

Get plenty of rest and stay hydrated during acute infection
Eat a balanced diet with plenty of vegetables and lean protein
Avoid alcohol completely, as it damages your liver further
Take antiviral medications like tenofovir or entecavir for chronic infection
Get regular monitoring with blood tests every 3 to 6 months
Consider peginterferon injections in some cases of chronic infection
Maintain a healthy weight to reduce liver stress
Avoid medications that can harm your liver without doctor approval
Get screened for liver cancer if you have chronic infection

See your doctor right away if you think you were exposed to Hepatitis B. A vaccine or immunoglobulin shot within 24 hours can prevent infection. If you have chronic Hepatitis B, work with a liver specialist called a hepatologist.

Frequently asked questions

All three types cause liver inflammation but come from different viruses. Hepatitis A spreads through contaminated food and water and usually goes away on its own. Hepatitis B spreads through blood and body fluids and can become chronic. Hepatitis C spreads mainly through blood and often becomes chronic, but new medications can cure it.

Acute Hepatitis B often clears on its own within six months without treatment. Chronic Hepatitis B cannot be cured, but antiviral medications can control the virus and prevent liver damage. Treatment keeps viral levels very low and reduces the risk of cirrhosis and liver cancer. Some people may stop treatment after several years if their infection becomes inactive.

Everyone should get tested at least once in their lifetime. You need testing if you were born in a country where Hepatitis B is common, have HIV, are pregnant, use injection drugs, or have a family member with the virus. Healthcare workers, people on dialysis, and those taking immune-suppressing drugs should also get tested.

Yes, the Hepatitis B vaccine is safe and highly effective. It requires three or four shots over six months. All babies should get vaccinated starting at birth. Adults who were never vaccinated should get the vaccine, especially if they have risk factors.

Yes, you can spread Hepatitis B to family members through blood or sexual contact. Your family members should get vaccinated to protect themselves. Avoid sharing razors, toothbrushes, nail clippers, or anything that might have your blood on it. Use condoms during sex to reduce transmission risk.

A positive Hepatitis Be antigen test means you have an active Hepatitis B infection. The virus is multiplying rapidly in your body. You are highly contagious during this time. Your doctor will monitor you closely and may recommend antiviral treatment to reduce viral activity.

Yes, women with Hepatitis B can have healthy babies. You need to tell your doctor about your infection before or during pregnancy. Your baby will get a vaccine and immunoglobulin shot right after birth to prevent infection. These interventions are more than 90 percent effective at protecting your baby.

Avoid alcohol completely because it accelerates liver damage. Limit salty foods if you have cirrhosis, as salt can cause fluid buildup. Reduce processed foods, fried foods, and foods high in saturated fat. Focus on vegetables, fruits, whole grains, and lean proteins to support liver health.

Most people with chronic Hepatitis B need blood tests every 3 to 6 months. Your doctor checks your viral load, liver function, and alpha-fetoprotein levels. More frequent testing may be needed if you start new treatment or have signs of liver damage. Regular monitoring helps catch problems early.

If you cleared an acute infection, the virus rarely comes back in healthy people. However, the virus can reactivate in people taking immune-suppressing drugs or chemotherapy. If you have chronic Hepatitis B, the virus stays in your body but may become inactive. Stopping treatment can cause the virus to become active again.