Hepatitis A
What is Hepatitis A?
Hepatitis A is a viral infection that affects your liver. The hepatitis A virus causes inflammation and swelling in your liver tissue. This can make it harder for your liver to do its job of filtering toxins and processing nutrients.
Unlike other types of hepatitis, hepatitis A does not cause long-term liver damage in most cases. Most people recover fully within a few weeks to months. The virus spreads through contaminated food or water, or through close contact with someone who has the infection.
Hepatitis A is preventable with vaccination. The vaccine is highly effective and provides long-lasting protection. Even if you do get infected, your body builds immunity that protects you from getting hepatitis A again in the future.
Symptoms
- Fatigue and weakness that feels more intense than usual tiredness
- Nausea, vomiting, or loss of appetite
- Abdominal pain or discomfort, especially on the right side under your ribs
- Dark urine that looks like tea or cola
- Clay-colored or pale bowel movements
- Jaundice, which is yellowing of your skin and the whites of your eyes
- Low-grade fever, usually under 102°F
- Joint pain or muscle aches
- Itchy skin without a visible rash
Some people, especially young children under age 6, may have no symptoms at all. They can still spread the virus to others even without feeling sick. Symptoms typically appear 2 to 6 weeks after exposure to the virus.
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Causes and risk factors
Hepatitis A spreads when someone ingests the virus, even in microscopic amounts. This usually happens through contaminated food or water that has been in contact with stool from an infected person. You can also get hepatitis A through close personal contact with someone who has the virus, including sexual contact or caring for someone who is ill.
Risk factors include traveling to countries where hepatitis A is common, using recreational drugs, living with or caring for someone with hepatitis A, and men who have sexual contact with men. Poor sanitation and lack of clean water increase risk in certain areas. Food handlers who are infected can also spread the virus if they do not wash their hands properly. You cannot get hepatitis A from casual contact like hugging, sneezing, or sitting next to someone who is infected.
How it's diagnosed
Doctors diagnose hepatitis A with a blood test that looks for specific antibodies your immune system makes to fight the virus. The hepatitis A IgM antibody test detects recent infection. These antibodies show up in your blood as early as 2 weeks after you are exposed to the virus.
Your doctor may also check liver function tests to see how well your liver is working. These tests measure enzymes and proteins that increase when your liver is inflamed. Talk to a doctor if you think you have been exposed to hepatitis A or if you are experiencing symptoms. Early diagnosis helps you get the care you need and prevents spreading the virus to others.
Treatment options
- Rest as much as possible to help your body fight the infection
- Drink plenty of fluids to stay hydrated, especially if you have vomiting or diarrhea
- Eat small, frequent meals if you have nausea or poor appetite
- Avoid alcohol completely, as it puts extra stress on your liver
- Stop or limit medications that can harm the liver, only under doctor guidance
- Wash your hands thoroughly and often to prevent spreading the virus to others
- Get plenty of sleep and avoid strenuous activity until you feel better
- Eat easy-to-digest foods like bananas, rice, applesauce, and toast
There is no specific medication that cures hepatitis A. Your immune system clears the virus on its own over time. Most people recover completely within 2 months, though some may feel tired for up to 6 months. See a doctor right away if you have severe vomiting, signs of dehydration, confusion, or if your symptoms get worse instead of better.
Frequently asked questions
Most people recover from hepatitis A within 2 months of becoming sick. You should start feeling better within a few weeks as your liver heals. Some people, especially adults, may feel tired or weak for up to 6 months after the initial infection. Complete recovery means your liver returns to normal function with no lasting damage.
No, you cannot get hepatitis A more than once. After you recover from the infection, your body develops lifelong immunity to the virus. Your immune system remembers the virus and protects you if you are exposed again. This is why people who have had hepatitis A do not need the vaccine.
Yes, hepatitis A is highly contagious. The virus spreads through the fecal-oral route, which means it passes from stool to mouth through contaminated food, water, or surfaces. You can spread the virus to others from about 2 weeks before symptoms start until about a week after jaundice appears. Good hand hygiene is the best way to prevent spreading the infection.
The CDC recommends hepatitis A vaccination for all children at age 1 year and for adults who are at increased risk. This includes travelers to countries with high rates of hepatitis A, men who have sex with men, people who use drugs, and people with chronic liver disease. The vaccine is given as two shots, 6 to 18 months apart, and provides long-lasting protection.
Any food or drink can spread hepatitis A if it is contaminated by an infected person who did not wash their hands properly. Common sources include raw or undercooked shellfish from contaminated water, fresh produce washed in contaminated water, and foods prepared by infected food handlers. Freezing food does not kill the virus, but cooking foods to at least 185°F for one minute does.
Hepatitis A rarely causes permanent liver damage. Most people recover completely with no long-term effects on their liver. In rare cases, especially in people over age 50 or those with existing liver disease, hepatitis A can cause severe liver failure. This happens in less than 1% of cases but may require hospitalization or liver transplant.
Blood tests can detect hepatitis A IgM antibodies as early as 2 weeks after exposure to the virus. These antibodies appear before symptoms start and remain detectable for several months after infection. If you think you were exposed, talk to your doctor about the right time to get tested based on when exposure occurred.
Hepatitis A, B, and C are all viruses that infect the liver, but they spread differently and have different outcomes. Hepatitis A spreads through contaminated food and water and does not cause chronic infection. Hepatitis B and C spread through blood and body fluids and can cause chronic, lifelong infections that may lead to cirrhosis or liver cancer. Vaccines exist for hepatitis A and B but not for hepatitis C.
Yes, avoid alcohol completely while recovering from hepatitis A, as it stresses your already inflamed liver. Also limit fatty, greasy, or heavy foods that are hard to digest. Stick to bland, easy-to-digest foods if you have nausea. Focus on staying hydrated and eating small meals throughout the day rather than large ones.
You should stay home from work or school until at least one week after jaundice appears or symptoms start. This helps prevent spreading the virus to others. Food handlers and healthcare workers may need to stay home longer based on public health guidelines. Talk to your doctor about when it is safe to return to your normal activities.