Hepatitis means an inflammation, or swelling, of the liver.
Viruses can cause hepatitis.
Hepatitis is a very common disease. It can affect people even if their immune systems are healthy. Many cases of hepatitis aren't treated because people think they have the flu. The most common symptoms are loss of appetite, fatigue, fever, body aches, nausea and vomiting, and stomach pain. Your doctor will check your blood to see if your liver is working normally.