Hepatitis A is a viral infection that inflames your liver
Hepatitis A is an infection caused by a virus that attacks your liver. The virus spreads through contaminated food or water, or through close contact with someone who has it. Unlike some other forms of hepatitis, hepatitis A does not cause long-term liver damage — most people recover completely within a few weeks or months, and the infection clears from their body entirely.
The virus damages liver cells, which causes inflammation. Your liver swells and becomes irritated, leading to the symptoms you might notice: yellowing of the skin and eyes, dark urine, pale stools, fatigue, and abdominal pain. These symptoms can feel severe while they last, but they are signs that your immune system is fighting the infection, not that permanent damage is happening.
Key Takeaways
- Hepatitis A spreads through contaminated food and water or close contact with an infected person, not through blood or sexual contact.
- Symptoms include yellowing of the skin and eyes, dark urine, fatigue, and stomach pain, usually appearing two to seven weeks after exposure.
- Most people recover fully without treatment, though recovery can take several weeks to months depending on age and overall health.
- A vaccine prevents hepatitis A and is recommended for all children and for adults at higher risk of exposure.
- Careful handwashing and food safety are the main ways to prevent spreading the virus to others.
How the virus spreads from person to person
Hepatitis A spreads when you swallow the virus, usually through food or water contaminated by stool from an infected person. This happens most often in places where sanitation is poor, but it can occur anywhere. The virus can survive on surfaces and in food for hours or even days.
You can also catch hepatitis A through close personal contact with someone who has it — sharing utensils, towels, or a toothbrush, or touching your mouth after touching their skin. Healthcare workers and people who change diapers face higher risk. The virus does not spread through blood, saliva alone, or sexual contact.
People are most contagious one to two weeks before symptoms start and one week after they appear, though they can shed the virus in their stool for up to three months. Many infected people, especially children, have no symptoms at all but can still spread the virus to others.
Symptoms usually appear two to seven weeks after exposure
The time between catching the virus and feeling sick — called the incubation period — is typically two to seven weeks. During this time, you may have no idea you are infected, but you can still pass the virus to others.
When symptoms do appear, they often come on suddenly. You might feel tired, have muscle aches, lose your appetite, or develop a fever. Within a few days, you may notice yellowing of the skin and the whites of your eyes (a condition called jaundice), dark urine that looks like tea or cola, pale or clay-colored stools, and pain in the upper right side of your belly where your liver sits.
Symptoms are usually worse in adults than in children. Young children often have no symptoms at all, even though they carry and shed the virus. Older adults and people with existing liver disease tend to have more severe symptoms and longer recovery times.
Your doctor diagnoses hepatitis A with a blood test
If your doctor suspects hepatitis A, they will order a blood test to look for antibodies — proteins your immune system makes to fight the virus. The test specifically looks for IgM antibodies, which appear early in infection and confirm that you have hepatitis A right now or very recently.
Your doctor may also check your liver function with a test that measures enzymes in your blood. These enzymes leak into the bloodstream when liver cells are inflamed, so high levels confirm that your liver is affected. You do not need imaging or a liver biopsy to diagnose hepatitis A — the blood tests are enough.
Testing is straightforward and results usually come back within a few days. Once you know you have hepatitis A, your doctor can advise you on rest, fluids, and when you can safely return to work or school.
Recovery happens on its own, without specific treatment
There is no medicine that kills the hepatitis A virus. Your immune system clears the infection naturally, which usually takes several weeks to a few months. During that time, the main goal is to rest and let your body heal while managing your symptoms.
Your doctor will likely recommend staying home, drinking plenty of fluids to prevent dehydration, eating nutritious food when you feel able, and avoiding alcohol, which puts extra strain on your liver while it is recovering. Over-the-counter pain relievers like acetaminophen can help with aches, though you should use them sparingly and only as directed, since your liver is already stressed.
Most people feel well enough to return to normal activities within a few weeks, though some fatigue may linger for months. Once you have recovered, you cannot catch hepatitis A again — your immune system remembers the virus and protects you for life.
Vaccination prevents hepatitis A before exposure
The hepatitis A vaccine is highly effective and is given as a series of two shots, spaced six months apart. The vaccine is recommended for all children starting at age one year. Adults who were not vaccinated as children can receive it at any age, especially if they travel to areas where hepatitis A is common, work in food service, care for children, or have certain medical conditions.
The vaccine works by teaching your immune system to recognize and fight the virus if you are ever exposed. Protection begins after the first dose and becomes very strong after the second dose. Most people who are vaccinated never develop hepatitis A, even if exposed to the virus.
If you have already had hepatitis A, you do not need the vaccine — your natural immunity is lifelong. If you are unsure whether you have been vaccinated or had the infection, a simple blood test can check for antibodies.
Preventing spread to others while you are sick
If you have hepatitis A, the most important step is careful handwashing. Wash your hands with soap and warm water for at least 20 seconds after using the bathroom, before eating, and before preparing food. Hand sanitizer does not kill hepatitis A virus as effectively as soap and water, so washing is better.
Do not prepare food for others while you are sick. If someone else must handle your laundry or dishes, they should wash their hands afterward. Disinfect bathroom surfaces with a bleach solution (one part bleach to ten parts water) if possible. Do not share personal items like toothbrushes, razors, or eating utensils.
Tell close contacts — family members, sexual partners, and people you spend time with — that you have hepatitis A so they can watch for symptoms and talk to their doctor about whether they need post-exposure prevention. People who were exposed but not yet sick can sometimes receive an injection of antibodies called immune globulin within two weeks of exposure to reduce their risk of infection.
Frequently Asked Questions
Can hepatitis A cause permanent liver damage?
No. Hepatitis A does not cause chronic infection or scarring of the liver. Your liver heals completely after the acute infection clears. Some people, especially older adults or those with existing liver disease, may take longer to recover, but the outcome is still full recovery without lasting damage.
Is hepatitis A the same as hepatitis B or C?
No. Hepatitis A, B, and C are three different viral infections. Hepatitis A spreads through food and water and does not become chronic. Hepatitis B and C spread through blood and can cause long-term infection. Each has different vaccines and treatments.
What should I eat while I have hepatitis A?
Eat whatever you can tolerate. Light, bland foods like crackers, toast, rice, and broth are often easier on the stomach. Stay hydrated by drinking water, juice, or broth. Avoid alcohol completely, and limit fatty or greasy foods if they upset your stomach. There is no special diet that speeds recovery.
Can I go back to work or school while I have hepatitis A?
Most places require you to stay home until at least one week after jaundice appears, or until your doctor says it is safe. If you work in food service, healthcare, or childcare, restrictions may be longer. Ask your doctor when you can safely return based on your symptoms and job duties.
Do I need to see a specialist for hepatitis A?
Usually not. Your primary care doctor can diagnose and manage hepatitis A. You would see a liver specialist (hepatologist) only if you have severe complications, which are rare, or if you have other liver conditions that make your case more complex.