Hepatitis B & C: How They Harm the Liver and How to Stop It

Receiving a diagnosis of Hepatitis B or C can be overwhelming, but it is critical to understand that both are manageable conditions when approached with consistent medical oversight. By understanding how hepatitis B and C liver damage progresses, patients can take proactive steps to prevent long-term complications and maintain their health through expert care.

Understanding Hepatitis B and C: How They Cause Liver Damage

At their core, Hepatitis B and C are viral infections that specifically target hepatocytes, the primary functional cells of the liver. When these viruses enter the bloodstream, they seek out the liver, where they begin to replicate. This replication process triggers the body’s immune system to attack the infected liver cells, leading to chronic inflammation.

Why the liver is the primary target

These viruses can only enter liver cells, which carry the receptors they latch onto. The persistent inflammation caused by the immune system’s attempt to clear the virus is what ultimately damages the liver tissue.

Most of the damage comes from the immune system attacking infected cells, rather than from the virus itself: the body’s T-cells try to identify and destroy infected hepatocytes. Over time, the body attempts to repair this inflammation by laying down scar tissue, a process known as fibrosis.

The timeline of liver scarring

This is often a silent progression. Patients frequently remain asymptomatic for years, or even decades, while the virus quietly damages the organ.

• Acute infection: Refers to the initial phase (the first six months).
• Chronic infection: Occurs when the virus persists beyond this window.
• Cirrhosis: If left untreated, the cycle of chronic inflammation and scarring eventually leads to cirrhosis, where the healthy, flexible liver tissue is replaced by hard, fibrous, non-functional tissue.

This stage significantly impairs liver function, as the scarred tissue cannot process blood or toxins effectively. This creates a "back-pressure" effect in the liver's blood vessels, leading to complications like portal hypertension, fluid retention, and jaundice.

How Hepatitis B and C Spread: Common Transmission Routes in India

Understanding transmission is not about assigning blame, but about preventing the spread within families and the community. In India, the transmission patterns often differ from Western nations, requiring specific awareness of local risk factors.

Recognizing high-risk behaviors

Vertical transmission, or mother-to-child transmission during childbirth, remains a significant factor in the spread of Hepatitis B. Beyond this, medical and procedural safety is paramount. Historically, the reuse of needles, unsterilized surgical or dental equipment, and blood transfusions that were not rigorously screened have contributed to infection rates.

In the Indian context, we must also be vigilant about:

• Informal healthcare settings: Procedures performed by unlicensed practitioners using non-sterile equipment.
• Personal grooming: The use of unsterilized razors at roadside barbers or sharing personal grooming items like nail clippers or toothbrushes.
• Tattoos and Piercings: The use of unsterilized needles in unregulated tattoo parlors or for traditional piercing ceremonies.
• Unprotected sexual contact: A common route for hepatitis B. For hepatitis C the risk is low in a stable couple but higher with multiple partners or HIV.

It is vital to clarify that these viruses are not spread through casual contact, such as hugging, shaking hands, sharing food, or coughing.

The importance of universal safety precautions

Prevention is the most effective tool we have. Always ensure that any medical or dental procedure involves the use of disposable, single-use needles and sterilized instruments. If you are getting a tattoo or piercing, confirm that the studio adheres to strict hygiene standards. For those in high-risk categories, such as healthcare workers, household contacts of an infected person, or dialysis patients, vaccination (specifically for Hepatitis B) is the gold standard of protection.

I Tested Positive: What Happens Next?

A positive test result often induces immediate anxiety, but it is important to remember that modern medicine has transformed these infections from life-threatening mysteries into highly manageable conditions. The goal of early medical intervention is to suppress the virus, stop ongoing inflammation, and prevent long-term damage.

Initial blood work requirements

Once a positive result for HBsAg (Hepatitis B Surface Antigen) or HCV Antibody (Hepatitis C) is received, your specialist will order a comprehensive diagnostic panel. This includes:

• Liver Function Tests (LFTs): To check enzyme levels (ALT/AST), which indicate current liver inflammation.
• Complete Blood Count (CBC): To assess platelet counts, which can be an early indicator of liver scarring.
• Prothrombin Time (PT/INR): To evaluate the liver's ability to produce clotting factors.
• For hepatitis B: HBeAg and a hepatitis D (anti-HDV) test.

A positive hepatitis C antibody only shows you have met the virus. About one in four people clear it on their own, so an HCV RNA test is needed to confirm active infection.

Crucially, we must determine if the virus is actively replicating or if it is in an inactive, "carrier" state.

Understanding viral load and replication

The next step is a viral load test, HBV DNA for Hepatitis B and HCV RNA for Hepatitis C. This test measures the actual amount of virus circulating in your blood.

• Who needs hepatitis B treatment: Treatment is generally advised if you have cirrhosis with any detectable virus, or a viral load above about 2,000 IU/mL together with raised ALT or significant scarring on FibroScan. A family history of liver cancer, or upcoming chemotherapy or immunosuppression, are also reasons to treat. The 2024 WHO guidance widened these criteria, so more people now qualify.
• Inactive infection: A patient may have the virus present but at very low levels, with normal liver enzymes and no evidence of active inflammation. People who do not need treatment yet are checked every 6 to 12 months, because the infection can become active again.
• Hepatitis C: Anyone with a detectable HCV RNA should be offered treatment.

This is decided by your hepatologist or gastroenterologist.

Diagnostic Imaging: Assessing Liver Health Without Biopsy

In the past, liver biopsies were the standard for assessing damage. Today, non-invasive tests give accurate information without a needle in most patients.

What your FibroScan score reveals

The FibroScan (liver stiffness test) uses vibration-controlled transient elastography to measure the "stiffness" of your liver. A healthy liver is soft and elastic; a scarred, cirrhotic liver is stiff. The result, given in kilopascals, is translated into a fibrosis stage from F0 (no fibrosis) to F4 (cirrhosis). This score is vital for determining the urgency of treatment and monitoring the effectiveness of therapy over time. It is painless, takes less than 10 minutes, and yields immediate results.

When imaging is essential

While FibroScan measures stiffness, standard abdominal ultrasounds or CT scans are necessary to screen for structural changes, such as nodules or tumors that can occur in a damaged liver. Even if you feel completely healthy, keep these appointments. Regular monitoring ensures that if the liver begins to show structural changes, we can intervene early, long before the condition reaches a critical state. Ultrasound is particularly effective at detecting suspicious liver lesions that may require further characterization via MRI or CT imaging.

Treatment Strategies for Hepatitis B and C

Treatment strategies differ fundamentally between the two viruses. Hepatitis C is now considered a curable condition, while Hepatitis B management focuses on long-term suppression.

The cure for Hepatitis C

We have entered a new era for Hepatitis C treatment, thanks to Direct-Acting Antivirals (DAAs). These oral medications are highly effective, often curing the infection in 8 to 12 weeks with success rates exceeding 95% (known as SVR12: the virus is still undetectable 12 weeks after finishing treatment). The treatment is generally well-tolerated with few side effects. Antiviral treatment is led by a hepatologist, who checks for drug interactions before starting the regimen; I coordinate closely with them, particularly when there is advanced scarring or a lesion in the liver.

Cure lowers but does not remove the risk of liver cancer. If you had advanced scarring or cirrhosis (F3/F4) before treatment, keep having an ultrasound every 6 months after cure. Reinfection is possible, so avoid the exposure that caused it.

Managing Hepatitis B: Suppression over elimination

Hepatitis B treatment, typically involving oral antivirals like Tenofovir or Entecavir, focuses on suppressing the virus to undetectable levels, and for most people it is long-term. Keeping the viral load low protects the liver from further damage and significantly lowers the risk of complications like cancer.

It is critical that patients never stop this medication without direct supervision from their doctor, as sudden withdrawal can cause a dangerous "flare" or reactivation of the virus, which can lead to acute liver failure. In India, the National Viral Hepatitis Control Program (NVHCP) provides resources and treatment support, which patients can access alongside specialised hepatology care.

The Risk of Liver Cancer (HCC) and Surveillance

One of the most serious complications of chronic hepatitis is Hepatocellular Carcinoma (HCC), or liver cancer. Because chronic hepatitis causes no symptoms for years, liver cancer can grow unnoticed until it is advanced.

Why surveillance is a lifelong commitment

Hepatitis B is particularly tricky because it can cause liver cancer even in patients who have not yet developed cirrhosis. This is why 6-monthly ultrasound surveillance is the gold standard for high-risk patients. This regular imaging allows us to catch any suspicious nodules at their earliest, most treatable stage. We also use the Alpha-fetoprotein (AFP) blood test as a tumor marker alongside imaging to increase the sensitivity of our screening process.

Reactivation risks during other medical treatments

Patients with chronic Hepatitis B must be extremely cautious if they require chemotherapy, steroid therapy, or biologic treatments for other conditions (such as rheumatoid arthritis, inflammatory bowel disease, or cancers). These treatments suppress the immune system, which can cause the Hepatitis B virus to "reactivate" and multiply rapidly, leading to acute liver failure. Always inform any doctor treating you for other conditions about your hepatitis status before beginning new medications. Your doctor may start a preventive antiviral before treatment. This also applies if you are HBsAg-negative but anti-HBc positive.

Lifestyle Factors That Accelerate Liver Damage

While the virus is the primary driver of damage, your lifestyle choices act as "force multipliers." If your liver is already fighting a viral infection, adding other stressors can rapidly accelerate the progression toward cirrhosis.

Alcohol and viral hepatitis: A dangerous combination

Alcohol is a hepatotoxin; it is processed by the liver and directly contributes to inflammation and scarring. For a patient with Hepatitis B or C, alcohol consumption is essentially throwing fuel on a fire. It significantly increases the likelihood of developing cirrhosis and liver cancer. If you are currently struggling to manage alcohol intake, it is vital to discuss this with your specialist. You can learn more about the recovery process in our guide on what happens to your liver after you stop drinking.

Managing co-existing fatty liver

Many patients also have Metabolic Dysfunction-Associated Steatotic Liver Disease (formerly NAFLD). When viral hepatitis and fatty liver coexist, the risk of cirrhosis rises considerably. Maintaining a liver-healthy diet, low in processed sugars, refined carbohydrates, and saturated fats, is essential.

• Dietary focus: Prioritize whole grains, lean proteins (fish, pulses), and fresh vegetables.
• Hydration: Water is the best drink for your liver.
• Weight management: Even a modest reduction in body weight (5-7%) can significantly reduce liver inflammation.

Protecting Your Family: Screening and Vaccination

Because Hepatitis B and C can be transmitted through blood and, in the case of Hepatitis B, through vertical transmission, protecting your family is a priority.

Newborn protection: The birth dose and HBIG

For mothers who are HBsAg-positive, the risk of passing the virus to the newborn can be high, particularly when the viral load is high. However, this is preventable. Babies of HBsAg-positive mothers should get both the first vaccine dose and Hepatitis B Immunoglobulin (HBIG) within 12 hours of birth. This combination provides immediate passive immunity and starts the baby's own immune response, preventing the vast majority of mother-to-child transmissions. Mothers with a high viral load (HBV DNA above about 200,000 IU/mL) are also given tenofovir from around 24 to 28 weeks of pregnancy. The baby is tested after finishing the vaccine course to confirm protection.

Why family screening saves lives

Every family member living in the same household as a patient with Hepatitis B or C, and every sexual partner, should be screened. If they test negative for Hepatitis B, they should be vaccinated immediately. There is currently no vaccine for Hepatitis C, but screening ensures that any family member who has contracted the virus can be identified and treated early, preventing the progression of their own liver disease. Vaccination for Hepatitis B is a three-dose series; ensuring all three doses are completed on schedule is essential for long-term immunity.

When Hepatitis Leads to Liver Failure: The Surgical Perspective

For a small percentage of patients, despite diligent medical management, the liver may progress to decompensated cirrhosis. This is a critical stage where the liver can no longer perform its essential functions.

Signs of decompensated liver disease

Decompensation manifests through symptoms like:

• Jaundice: Yellowing of the skin and eyes due to bilirubin buildup.
• Ascites: Fluid accumulation in the abdomen, causing swelling.
• Variceal bleeding: Internal bleeding from enlarged veins in the esophagus or stomach.
• Hepatic Encephalopathy: Confusion or altered consciousness due to toxin buildup in the brain.

These are medical emergencies. When the liver reaches this point, medical management is often no longer sufficient to maintain quality of life.

The role of liver transplantation

At this juncture, surgical evaluation for a liver transplant becomes necessary. As a surgical gastroenterologist, I work with the hepatologist so that the move from long-term medical care to transplant assessment happens without delay. We use the MELD (Model for End-Stage Liver Disease) score to assess the severity of liver disease and prioritize patients for transplant lists.

We perform a thorough evaluation to determine if a patient is a candidate for transplantation. While this may sound daunting, transplantation is a life-saving procedure that offers a new lease on life for those with end-stage liver disease. We guide patients through every step of this journey, from what happens during a liver transplant evaluation to the surgery itself.

Consulting a Specialist for Your Liver Health

Early intervention is your single most effective defense against the long-term consequences of Hepatitis B and C. You do not need to navigate this diagnosis alone. Whether you require initiation of antiviral therapy, regular surveillance, or a consultation regarding advanced liver disease, professional care is available.

I see patients with hepatitis B and C across five clinical locations in Chennai, working alongside hepatologists who lead antiviral treatment while I focus on liver scarring, liver lesions and transplant questions. If you have tested positive, you can book an appointment online or call +91 94440 43478. Please bring your HBsAg or anti-HCV result, any viral load reports, LFTs and scans.