hepatitis

Overview
Hepatitis is inflammation of the liver, which can impair its ability to function properly. It can be caused by viruses, alcohol, medications, toxins, or autoimmune reactions. The liver plays a key role in detoxifying the body, producing essential proteins, and processing nutrients, so inflammation can affect multiple systems.

Why It’s Important
Hepatitis can range from mild and self-limiting to chronic and life-threatening. Chronic hepatitis may lead to scarring (cirrhosis), liver failure, or liver cancer. Early detection and management are critical to prevent long-term liver damage and maintain overall health.

Quick Facts

  • Affects millions worldwide; prevalence depends on type (A, B, C, D, E)

  • Can occur at any age

  • Can be acute (short-term) or chronic (long-term)

  • Types include viral hepatitis (A–E), alcoholic hepatitis, autoimmune hepatitis, and drug-induced hepatitis

What Happens in the Body
Inflammation damages liver cells, impairing their ability to process toxins, produce bile, and synthesize essential proteins. In viral hepatitis, the immune system attacks infected liver cells, which can lead to liver cell death. Chronic inflammation causes fibrosis and scarring, eventually reducing liver function.

Common Signs and Symptoms

  • Fatigue and weakness

  • Loss of appetite and nausea

  • Abdominal pain or discomfort (especially in the upper right quadrant)

  • Jaundice (yellowing of skin and eyes)

  • Dark urine and pale stools

  • Joint pain and mild fever (in some viral forms)

Diagnosis

  • Blood tests to detect liver enzymes (ALT, AST), bilirubin, and clotting factors

  • Viral antigen and antibody testing for hepatitis A, B, C, D, or E

  • Imaging (ultrasound, CT, or MRI) for liver structure

  • Liver biopsy in select cases to assess extent of inflammation or fibrosis

Treatment and Management

  • Supportive care: Rest, hydration, and nutrition for mild hepatitis

  • Medications:

    • Antivirals for hepatitis B and C

    • Immunosuppressive therapy for autoimmune hepatitis

  • Lifestyle changes: Avoid alcohol, maintain healthy weight, avoid liver-toxic medications

  • Regular monitoring for liver function is critical

  • Chronic hepatitis often requires long-term management, while acute hepatitis may resolve on its own

Risks and Complications

  • Chronic liver disease or cirrhosis

  • Liver failure

  • Increased risk of hepatocellular carcinoma (liver cancer)

  • Portal hypertension (high blood pressure in liver vessels)

  • Bleeding disorders due to impaired clotting factor production

Who Is at Risk

  • People with unprotected sex, multiple partners, or injection drug use (for viral hepatitis B and C)

  • Travelers to areas with poor sanitation (hepatitis A and E)

  • Heavy alcohol users or people taking hepatotoxic medications

  • Individuals with autoimmune conditions or family history of liver disease

Related Conditions

  • Cirrhosis and liver fibrosis

  • Fatty liver disease

  • Liver cancer

  • Hepatic encephalopathy (brain dysfunction due to liver failure)

When to See a Doctor

  • Persistent fatigue or jaundice

  • Dark urine or pale stools

  • Unexplained abdominal pain or swelling

  • Nausea or vomiting that persists

  • Any suspicion of acute viral exposure or chronic liver disease

Hepatitis A

  • Cause: Hepatitis A virus (HAV), usually from contaminated food or water

  • Transmission: Fecal-oral route

  • Duration: Acute only; does not become chronic

  • Prevention: Vaccine available; good hygiene and sanitation

  • Symptoms: Fatigue, nausea, jaundice; usually self-limiting

Hepatitis B

  • Cause: Hepatitis B virus (HBV)

  • Transmission: Blood, sexual contact, mother-to-child at birth

  • Duration: Can be acute or chronic

  • Prevention: Vaccine available

  • Complications: Chronic infection can lead to cirrhosis or liver cancer

Hepatitis C

  • Cause: Hepatitis C virus (HCV)

  • Transmission: Blood-to-blood contact (e.g., needles, transfusions)

  • Duration: Often becomes chronic

  • Prevention: No vaccine; screening and safe practices key

  • Complications: Cirrhosis, liver cancer, and long-term liver damage

Hepatitis D

  • Cause: Hepatitis D virus (HDV), requires co-infection with HBV

  • Transmission: Blood or sexual contact

  • Duration: Can be acute or chronic

  • Prevention: HBV vaccination prevents HDV infection

  • Complications: More severe liver disease when co-infected with HBV

Hepatitis E

  • Cause: Hepatitis E virus (HEV)

  • Transmission: Fecal-oral route, often via contaminated water

  • Duration: Usually acute only

  • Prevention: Safe water and sanitation; vaccine exists in some countries

  • Complications: Severe in pregnant women, can cause fulminant hepatitis

Last Updated: October 2, 2025