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Overview
What Is Viral Hepatitis?
Viral hepatitis is inflammation of the liver caused by hepatitis viruses. The main types are hepatitis A, B, C, D and E. Some infections are temporary and clear on their own, while others can persist and cause chronic liver disease.
People can have viral hepatitis without noticeable symptoms. Depending on the virus, infection may affect people exposed through contaminated food or water, infected blood, sexual contact or transmission from a parent to a baby around birth.
Symptoms
Viral Hepatitis Symptoms
Hepatitis symptoms vary by the virus and by whether the infection is new or long-lasting. Many people have no noticeable symptoms, especially people with chronic hepatitis B or C, so testing may be important even when someone feels well.
- Tiredness (fatigue)
- Reduced appetite (loss of appetite)
- Nausea
- Vomiting
- Discomfort in the abdomen
- Dark urine
- Pale or clay-colored stools
- Fever
- Joint pain
- Yellow skin or eyes (jaundice)
How It Spreads
How Viral Hepatitis Spreads
How you acquire hepatitis depends on the virus. Hepatitis A and E usually spread by the fecal-oral route, when contaminated food, water or hands carry the virus into the mouth. Hepatitis B, C and D mainly spread through infected blood; hepatitis B and D can also spread through sexual contact or from parent to baby around birth.
| Virus | Usual spread | Can it become chronic? | Key prevention point |
|---|---|---|---|
| Hepatitis A | Contaminated food or water and close contact | No, it usually does not become chronic | Vaccination, handwashing, and safe food and water |
| Hepatitis B | Blood, sexual contact, and parent-to-baby transmission | Yes, especially when acquired early in life | Vaccination and avoiding blood or sexual exposure |
| Hepatitis C | Infected blood, often through shared injection equipment | Yes, it commonly can persist without treatment | Use sterile equipment and do not share items that may carry blood |
| Hepatitis D | Blood and body fluids, only in people who also have hepatitis B | Yes, persistent infection can occur | Prevent hepatitis B through vaccination and safer exposures |
| Hepatitis E | Contaminated food or water; some types can spread through undercooked meat | Usually no, but persistent infection can occur in some people with weakened immunity | Safe water, food hygiene, and thorough cooking |
Risk Factors
Risk Factors for Viral Hepatitis
Background factors
Some risk factors reflect where a person was born or has traveled, their age when exposed, or family circumstances. Being born to a parent with hepatitis B can increase the chance of infection, but these factors do not mean a person caused their infection.
Exposure factors that can be reduced
- Unprotected sex: reduce risk with barrier protection and appropriate hepatitis B vaccination.
- Sharing needles or injection equipment: use new, sterile equipment and seek testing.
- Unsterile tattoos or piercings: choose a regulated provider that uses sterile, single-use equipment.
- Household contact with infected blood: avoid sharing razors, toothbrushes or nail tools, and cover wounds.
- Contaminated food or water: wash hands and use safe water and food-handling practices.
- Lack of vaccination: ask a clinician whether hepatitis A or B vaccination is recommended.
- Birth in or travel to a region where hepatitis is more common: discuss testing and vaccination with a clinician.
- Potentially unsafe medical care or blood exposure: arrange testing after a possible exposure.
Complications
Viral Hepatitis Complications
Acute hepatitis is a short-term infection that may resolve, although it can rarely cause sudden, severe liver failure. Chronic hepatitis B or C may progressively damage the liver over years and requires medical follow-up to reduce complications.
- Cirrhosis, or permanent liver scarring
- Liver failure
- Portal hypertension, or high pressure in the liver’s blood vessels
- Internal bleeding from enlarged veins
- Liver cancer
- Fluid buildup in the abdomen
- Kidney problems or other complications outside the liver
Emergency warning
Get urgent medical help for severe symptoms
Go to emergency care for confusion, extreme sleepiness, vomiting blood, black stools, severe abdominal swelling or rapidly worsening jaundice.
Diagnosis
How Viral Hepatitis Is Diagnosed
Symptoms cannot reliably identify the virus. Diagnosis usually begins with a medical history and physical examination, followed by blood tests that look for the virus, immune response and signs of liver inflammation.
| Test | What it helps show | When it may be used |
|---|---|---|
| Antibody tests | Whether the immune system has responded to a hepatitis virus | Initial testing or to identify past exposure |
| Antigen or viral-marker tests | Whether viral proteins or markers of an active infection are present | To identify a current infection or its stage |
| Nucleic-acid tests | Whether viral genetic material is present and, in some cases, how much | To confirm infection and monitor treatment response |
| Liver enzyme tests | Whether liver cells show signs of inflammation or injury | Alongside virus-specific testing and during follow-up |
| Liver imaging or fibrosis assessment | Whether the liver has scarring, stiffness or other structural changes | To assess liver damage and guide monitoring or treatment |
Additional testing may show whether an infection is recent, resolved or chronic. Clinicians may also assess liver scarring to guide treatment and decide how closely to monitor liver health.
Treatment Options
Viral Hepatitis Treatment Options
Supportive care for acute hepatitis
Many short-term infections, including hepatitis A, are treated with supportive care rather than antibiotics. Rest as needed, fluids, adequate nutrition, avoiding alcohol and clinician-guided medicines can support recovery; people with severe symptoms, pregnancy, other liver disease or a weakened immune system may need closer monitoring. Follow-up helps confirm recovery and checks for dehydration or worsening liver function.
Antiviral treatment for chronic hepatitis B
Some people with chronic hepatitis B need antiviral medicines to suppress the virus and lower the risk of liver damage. A specialist selects treatment based on viral activity, liver inflammation, scarring and other health factors. Regular blood tests and liver monitoring are important because treatment may control hepatitis B rather than remove it completely.
Direct-acting antivirals for hepatitis C
Direct-acting antiviral medicines can usually cure hepatitis C by stopping the virus from making new copies. Treatment choice and duration depend on the virus, liver condition, other medicines and past treatment, so specialist guidance and adherence are important. Testing after treatment confirms whether the virus has cleared, but a person can be reinfected after a new exposure.
Prevention & Screening
Viral Hepatitis Prevention and Screening
Vaccination can prevent hepatitis A and B where recommended. Handwashing, safe food and water, safer sex, sterile injection or tattoo equipment, and avoiding contact with infected blood reduce exposure; never share needles, razors or toothbrushes that may carry blood.
Who should be screened?
Screening may be recommended during pregnancy for hepatitis B, after blood or sexual exposure, for people born in or from higher-prevalence regions, and for people with HIV or other liver disease. Testing is also important for people who have injected drugs or received potentially unsafe medical care. Screening frequency depends on personal risk and local guidance; people with chronic hepatitis need ongoing liver monitoring, not just a one-time test.
Outlook and Prognosis
Outlook and Prognosis for Viral Hepatitis
Acute infection
Short-term hepatitis often resolves with supportive care, depending on the virus and the person’s health. Follow-up is important if symptoms are severe or liver tests remain abnormal.
Chronic infection
Chronic hepatitis may require long-term or lifelong monitoring and, for some people, antiviral treatment. Ongoing care helps detect scarring and other liver complications early.
Hepatitis C is often curable with modern antiviral treatment, while hepatitis B can usually be controlled but may persist. The outlook depends on the amount of liver scarring, treatment response, reinfection risk and regular monitoring.
When Should You See a Doctor
When Should You See a Doctor for Viral Hepatitis?
Contact a clinician after a possible exposure, if jaundice or dark urine develops, during pregnancy when hepatitis B status is unknown, or when screening is recommended because of your risk. Because viral hepatitis can be silent, testing may be useful even without symptoms.
Act quickly
Know when symptoms are urgent
Seek emergency care for confusion, severe weakness, uncontrolled vomiting, vomiting blood, black stools, severe abdominal swelling or rapidly worsening jaundice.
Branches
2 topics
Viral Hepatitis
Gastroenterology
Viral Hepatitis
Infectious Diseases
Tests & Procedure
3 topics
Viral Hepatitis
Albumin Blood Test
Viral Hepatitis
Alt Blood Test
Viral Hepatitis
Bilirubin Blood Test
Viruses
1 topic
Viral Hepatitis
Hepatitis B
Symptoms
5 topics
Viral Hepatitis
Abdominal Pain
Viral Hepatitis
Diarrhea
Viral Hepatitis
Fever
Viral Hepatitis
Jaundice
Viral Hepatitis
Vomiting
Body System & Organ
1 topic
Viral Hepatitis
Liver
