Hepatitis B is a viral infection caused by the hepatitis B virus (HBV) that attacks the liver, ranging from a mild, short-term illness to a lifelong chronic condition. Because the virus often produces no initial symptoms, people can unknowingly carry it for years while it silently causes inflammation, potentially leading to severe liver scarring (cirrhosis) or liver cancer.
According to the Centers for Disease Control and Prevention (CDC), an estimated 640,000 people in the United States are currently living with chronic hepatitis B. Routine screening, early diagnosis, and targeted antiviral treatments are essential to suppress the virus, protect vital liver functions, and prevent long-term complications.
Hepatitis B at a Glance
- What it is: A viral liver infection caused by the hepatitis B virus (HBV) that triggers inflammation and can become a chronic, lifelong disease if not cleared by the immune system.
- Main Causes: Direct contact with infectious blood, semen, or other body fluids, most commonly spread through childbirth, sexual contact, shared needles, or occupational exposure.
- Common Warning Signs: Often asymptomatic in early stages, but symptoms can include persistent fatigue, jaundice (yellowing of the skin and eyes), dark urine, abdominal pain, nausea, and loss of appetite.
- Primary Risk Factors: Being born to an infected parent or in an endemic region, having unprotected sex with an infected partner, sharing drug equipment, and having coinfections like HIV or hepatitis C.
- Emergency Red Flags: Seek immediate medical attention for intense abdominal pain, mental confusion, persistent vomiting, excessive sleepiness, or signs of bleeding, which can indicate severe liver damage or failure.
- Care at TGH: Specialized, comprehensive care through the TGH Transplant Institute, offering advanced diagnostics, antiviral therapy, liver cancer surveillance, and nationally recognized liver transplantation services.
Warning Signs and Symptoms
HBV symptoms can vary widely from person to person. Some people may feel completely healthy for years before liver damage symptoms develop, while others might notice signs of acute liver inflammation within several weeks to months after exposure.
Common Symptoms
Although some people with hepatitis B remain symptom-free, others may experience:
- Fatigue: Persistent tiredness and reduced stamina.
- Jaundice: Yellowing of the skin and whites of the eyes.
- Digestive Issues: Loss of appetite, nausea, vomiting, and abdominal pain in the upper right side.
- Changes in Output: Dark, tea-colored urine and pale or clay-colored stools.
- General Illness: Joint pain and low-grade fever.
Uncommon Symptoms
Hepatitis B can sometimes cause symptoms outside the liver or produce atypical findings, including skin rashes, hives, kidney inflammation, blood vessel inflammation (vasculitis), numbness or tingling, and spleen enlargement.
Emergency Symptoms
Immediate medical attention is advised for intense abdominal pain, mental confusion, persistent vomiting, excessive sleepiness, significant jaundice, or signs of bleeding, as these symptoms may indicate severe liver damage or liver failure.
Causes, Transmission, and Risk Factors
The only direct cause of hepatitis B is infection with HBV. It is not caused by genetics, diet, smoking, alcohol consumption, or casual contact.
How Hepatitis B is Transmitted
The virus spreads when infectious blood, semen, or other body fluids enter the body. HBV can survive outside the body for at least a week, meaning contaminated items pose a risk. Transmission occurs through:
- Childbirth (perinatal exposure) if the birthing parent is infected.
- Vaginal, anal, or oral sex with a partner who has hepatitis B.
- Sharing needles, syringes, or drug preparation equipment.
- Sharing personal items that may contain blood, such as razors or toothbrushes.
- Needlestick injuries in health care settings or tattooing/piercing with unsterile equipment.
Primary Risk Factors
Certain factors increase the likelihood of exposure or the risk of developing chronic disease. These include being born to an infected parent (infants have the highest risk of chronic infection), being born in a region where HBV is endemic, having multiple sexual partners, receiving hemodialysis, or having a weakened immune system or coinfections like HIV or hepatitis C. Family history may also play a role due to shared household blood exposure or geographic risk.
Acute vs. Chronic Infection and Liver Complications
Health care providers classify hepatitis B as either acute or chronic based on how long the virus remains in the body.
Acute vs. Chronic Hepatitis B
- Acute Hepatitis B: A short-term infection. In most healthy adults (more than 90%), the immune system successfully clears the infection within six months, often leading to complete recovery and lifelong immunity.
- Chronic Hepatitis B: Occurs when the infection persists for longer than six months. Age is the most important factor; up to 90% of infants infected at birth develop chronic hepatitis B because their immune systems cannot eliminate the virus.
Progressive Liver Damage (Fibrosis and Cirrhosis)
HBV triggers an immune response that causes inflammation. If the infection becomes chronic, persistent inflammation triggers fibrosis (a buildup of scar tissue). Over time, extensive scarring (cirrhosis) can permanently change the liver's structure, reducing its ability to filter toxins, produce clotting proteins, process medications, store vitamins and nutrients, and produce bile for digestion. This scarring can also increase pressure in the liver's veins (portal hypertension).
Additional Complications: Liver Cancer and Coinfections
Chronic hepatitis B is a leading cause of hepatocellular carcinoma (primary liver cancer). The virus can lead to liver cancer even before cirrhosis is present, making routine surveillance (ultrasounds and blood work) essential. Additionally, people with hepatitis B are at risk for hepatitis D coinfection, a virus that only occurs in the presence of HBV and accelerates severe liver disease.
How Is Hepatitis B Diagnosed?
Because many infected people have no symptoms, screening is important for detecting the virus before serious liver damage occurs.
Clinical Assessment
A physician will assess symptoms, exposure risks, past vaccination status, and family history of liver disease. A physical exam checks for signs of liver inflammation, such as jaundice, abdominal tenderness, or swelling in the legs.
Diagnostic Tests and Imaging
Testing may include:
- Blood Tests: Hepatitis B surface antigen/antibody, core antibody, and "e" antigen/antibody tests confirm infection status and viral replication. HBV DNA (viral load) testing measures viral activity. Liver function tests, complete blood counts (CBC), and metabolic panels evaluate overall health and inflammation.
- Imaging: Liver ultrasounds evaluate structure, and elastography (FibroScan®) estimates liver stiffness caused by fibrosis. Endoscopy may be used if cirrhosis is present to check for enlarged veins.
- Liver Biopsy: In select cases, a biopsy assesses the degree of inflammation and scarring directly.
Conditions That Can Resemble Hepatitis B
A careful diagnostic process rules out other conditions that cause similar symptoms, such as other viral hepatitis infections (A, C, D, E), alcohol-associated liver disease, metabolic liver disease (MASLD), medication-related liver injury, autoimmune hepatitis, or gallbladder and bile duct disease.
Treatment, Monitoring, and Prevention
While acute hepatitis B often resolves on its own, chronic hepatitis B requires active management to suppress the virus and reduce inflammation.
Medical Monitoring and Antiviral Medications
Even if treatment is not immediately needed, regular follow-up is essential. When indicated, long-term antiviral therapy (such as Tenofovir disoproxil fumarate, Tenofovir alafenamide, or Entecavir) is used to suppress viral replication, slow fibrosis, and significantly decrease the risk of liver cancer. Pegylated interferon alfa may also be used to stimulate the immune system in select patients.
Future Treatments and Clinical Trials
Researchers continue to study therapies aimed at achieving a functional cure for hepatitis B by permanently suppressing viral activity. New antiviral medications and immune-based therapies are currently being evaluated in clinical trials.
Advanced Procedures and Liver Transplantation
If advanced complications arise, procedures like endoscopy (for enlarged veins) or paracentesis (fluid drainage) may be necessary. For end-stage liver disease or cancer, a liver transplant may be recommended. Modern antiviral medications are used before and after transplant to prevent HBV recurrence.
Prevention Strategies
Hepatitis B is highly preventable via safe and effective vaccines recommended by the CDC. Additional prevention strategies include practicing safer sex, not sharing needles or personal items like razors, screening pregnant patients to provide newborns with timely preventive treatment, and using sterile equipment for tattoos and piercings.
Living With Hepatitis B and Support
Living with chronic hepatitis B involves a partnership with a health care team and a focus on both physical and emotional well-being.
Lifestyle and Liver Protection
Patients are encouraged to avoid all alcoholic beverages, maintain a healthy body weight, eat a balanced diet, avoid tobacco, and consult a provider before using new medications or supplements that could stress the liver.
Mental, Emotional, and Social Effects
A hepatitis B diagnosis can cause anxiety, depression, or feelings of isolation due to misunderstandings about transmission. Joining a support group or talking with a mental health professional can help develop coping strategies. Socially and occupationally, HBV is not spread through casual contact; coworkers and friends are not at risk during everyday interactions like sharing office space or meals.
Supporting a Loved One
Family members and caregivers play an important role by encouraging medication compliance, helping prepare nutritious meals, and offering emotional support without judgment. Caregivers should also prioritize their own well-being and seek support when needed.
The TGH Difference for Hepatitis B
Managing hepatitis B requires specialized care focused on protecting liver health and preventing long-term complications. At Tampa General Hospital, patients benefit from a comprehensive evaluation, advanced diagnostic testing, and a personalized treatment plan developed by experts in liver disease.
The physicians and multispecialty teams within the TGH Transplant Institute provide comprehensive care for patients with acute and chronic hepatitis B, including antiviral therapy, liver fibrosis monitoring, liver cancer surveillance, and evaluation for advanced liver disease. For patients who require liver transplantation, TGH offers nationally recognized transplant expertise and coordinated care before, during, and after transplant.