Hepatitis is an inflammation of the liver caused by a virus, which can be acute or chronic. It is one of the most common causes of liver disease and can lead to serious health complications. Symptoms of hepatitis include fatigue, jaundice, abdominal pain, nausea, and loss of appetite. Treatment for hepatitis depends on the type and severity of the infection, but may include antiviral medications, lifestyle changes, and in some cases, surgery.