What Is Hepatitis?

Hepatitis is inflammation of the liver, and in the United States it is most often caused by a virus. The three main types are hepatitis A, hepatitis B, and hepatitis C, and each spreads differently and has different treatments. Hepatitis A spreads through contaminated food and water, while hepatitis B and C spread through blood and body fluids. Many people with hepatitis have no symptoms, so the infection can go unnoticed for years. Untreated hepatitis B and C can lead to liver damage, cirrhosis, and liver cancer. The good news is that hepatitis A and B are preventable with vaccines, and hepatitis C is curable with modern medication. This guide covers the symptoms, transmission, testing, and treatment for each type.

Symptoms

Many people with hepatitis have no symptoms, especially in the early stages. When symptoms do appear, they can include fatigue, nausea, poor appetite, belly pain, dark urine, and yellowing of the skin and eyes, which is called jaundice. Hepatitis A symptoms usually appear two to seven weeks after exposure and can last for weeks or months.

Hepatitis B and C often cause no symptoms for years, which is why many people do not know they are infected. Chronic infection can slowly damage the liver, and symptoms may only appear once significant damage has occurred. Testing is the only reliable way to know if you have hepatitis.

How It Spreads

Hepatitis A spreads through the fecal-oral route, usually from contaminated food or water, or close contact with an infected person. Good handwashing and the hepatitis A vaccine are the best protection.

Hepatitis B spreads through blood, semen, and other body fluids, most often through sex, sharing needles, or from a pregnant person to their baby. Hepatitis C spreads mainly through blood, with sharing needles being the most common route in the United States. Hepatitis B and C are not spread through casual contact, hugging, or sharing food.

Testing

Hepatitis testing is a blood test. A hepatitis panel checks for all three types at once. For hepatitis A and B, the test looks for antibodies, which show past infection or vaccination. For hepatitis B, it also checks for the surface antigen, which shows an active infection. For hepatitis C, the test looks for antibodies, and a positive result is confirmed with a follow-up test that detects the virus itself.

Window periods vary. Hepatitis A antibodies appear about two to three weeks after exposure, hepatitis B about three to six weeks, and hepatitis C about two to twelve weeks. Testing too early can miss an infection, so timing matters. Early detection is important because hepatitis B and C can cause lasting liver damage if untreated.

Order a Hepatitis A, B, C Test Online

Treatment and Cure

Treatment depends on the type. Hepatitis A usually clears on its own with rest and fluids, and most people recover fully. Hepatitis B is not curable, but it is manageable, and many adults clear the infection on their own. For chronic hepatitis B, medication keeps the virus under control and protects the liver.

Hepatitis C is curable. Modern antiviral medication cures more than 95% of cases, usually with a short course of pills. Vaccines prevent hepatitis A and B, and there is no vaccine for hepatitis C yet. Anyone with chronic hepatitis B or C should see a doctor regularly to monitor their liver.

Prevention

Vaccination is the strongest protection against hepatitis A and B. The CDC recommends the hepatitis B vaccine for all adults, and the hepatitis A vaccine for anyone who wants protection. Good handwashing prevents hepatitis A, especially after using the bathroom and before eating.

For hepatitis B and C, use condoms during sex, never share needles or personal items like razors and toothbrushes, and make sure any tattoos or piercings use sterile equipment. Regular testing is important for people at higher risk, because early treatment protects the liver.