Hepatitis B: Causes, Symptoms, Prevention and Treatment

Hepatitis B remains a major global health challenge, affecting an estimated 254 million people worldwide. Often called a “silent” infection, it can quietly damage the liver for years before symptoms appear. However, with advances in screening, vaccination, and treatment, the outlook for those with Hepatitis B has never been better.

What is Hepatitis B?

Hepatitis B is a viral infection caused by the Hepatitis B virus (HBV), primarily targeting the liver. The infection can be acute (short-term) or chronic (lasting more than six months). Chronic Hepatitis B is especially concerning, as it can lead to cirrhosis, liver failure, or liver cancer (hepatocellular carcinoma) if left untreated. Key Fact: Most adults clear acute Hepatitis B infection naturally, but up to 90% of infants infected at birth develop chronic infection.

How is Hepatitis B Transmitted?

HBV is not spread by casual contact (e.g., hugging, sharing food). Transmission requires direct exposure to infected blood or body fluids. The most common routes include:

• Mother-to-child transmission at birth (the leading cause in Asia and Africa)
• Unprotected sexual contact with an infected person
• Sharing needles/syringes (IV drug use, unsafe medical practices)
• Unsafe blood transfusions (now rare due to screening)
• Household contact (sharing razors, toothbrushes, or contact with open wounds—rare but possible)

Vaccination, safe practices, and routine screening of high-risk groups are the best preventive measures.

Symptoms: Why Hepatitis B is Called a “Silent” Disease

Many people with Hepatitis B never experience symptoms, especially in the early or chronic stages. When symptoms do occur, they may include:

Acute Hepatitis B (1–4 months after exposure)

• Fever
• Fatigue
• Nausea, vomiting
• Abdominal pain (especially upper right side)
• Dark urine, pale stools
• Joint pain
• Jaundice (yellowing of skin/eyes)

Most adults recover fully from acute infection. However, if the virus persists, it becomes chronic.

Chronic Hepatitis B

Often asymptomatic for years. As liver damage progresses:

• Persistent fatigue
• Loss of appetite
• Mild abdominal pain
• Jaundice
• Swelling in legs/abdomen (ascites)
• Confusion (in advanced liver disease)

How is Hepatitis B Diagnosed?

Diagnosis is straightforward with blood tests:

• HBsAg (surface antigen): Indicates current infection
• Anti-HBs: Indicates immunity (from past infection or vaccination)
• HBV DNA: Measures viral activity
• Liver function tests (LFTs): Assess liver health
• Imaging (Ultrasound, FibroScan): Detects liver scarring or stiffness

Regular monitoring is crucial for those with chronic infection.

Is Hepatitis B Curable?

Acute Hepatitis B

• Most adults clear the virus naturally and develop lifelong immunity.

Chronic Hepatitis B

• Current treatments do not “cure” chronic Hepatitis B in most cases, but they can suppress the virus to undetectable levels, prevent liver damage, and dramatically reduce the risk of cirrhosis and liver cancer.
• Functional cure (loss of HBsAg): Achieved in a small percentage with long-term therapy or interferon, but not reliably for all.

Latest Research: New drugs and immunotherapies are under study aiming for higher cure rates, but as of 2025, suppression and prevention of complications remain the main goals.

Treatment of Chronic Hepatitis B

Treatment is individualized, based on viral load, liver enzyme levels, age, and risk factors.

1. Antiviral Medications

• First-line: Tenofovir (TDF/TAF), Entecavir
• Taken daily, often long-term
• Highly effective at suppressing HBV and preventing liver damage
• Well-tolerated and safe for most patients

2. Pegylated Interferon

• Weekly injections for 6–12 months
• Can induce HBsAg loss in some, but with more side effects
• Not suitable for advanced liver disease or all patients

3. Monitoring (No Immediate Treatment)

• For patients with low viral load and healthy liver
• Regular blood tests and imaging every 6–12 months

4. Liver-Healthy Lifestyle

• No alcohol
• Maintain a healthy weight
• Control diabetes, cholesterol, and blood pressure
• Vaccinate against Hepatitis A
• Avoid unnecessary medications and supplements

Note: Herbal or alternative remedies are not substitutes for proven antiviral therapy. Always consult your hepatologist before trying any alternative treatments.

Complications of Untreated Hepatitis B

Without treatment and monitoring, chronic Hepatitis B can lead to:

• Cirrhosis (permanent liver scarring)
• Liver cancer (HCC)
• Liver failure

Regular monitoring and early intervention can prevent most of these complications.

Prevention: The Power of Vaccination

The Hepatitis B vaccine is safe, effective (>95%), and part of the universal immunization schedulein India and worldwide. It is given in 3 doses, starting at birth. Other preventive measures:

• Practice safe sex
• Do not share needles, razors, or toothbrushes
• Ensure blood products are screened
• Wear gloves when handling blood or open wounds

Key Takeaways

• • Hepatitis B is preventable and manageable.
  • Early detection and expert care can prevent severe liver complications.
  • Vaccination is the best protection—if you’re not vaccinated, it’s never too late.
  • With proper treatment, most people with chronic Hepatitis B can live long, healthy lives.

When to See a Liver Specialist

If you have risk factors, abnormal liver tests, or a family history of liver disease, consult a hepatologist for screening and guidance. In India, world-class expertise with Dr Arvinder Soin is available at Medanta The Medicity, Gurugram.