Hepatitis is simply inflammation of the liver. However, there are many causes of this inflammation. In the United States, some of the common causes are viruses which lead to diseases called hepatitis A, B or C. But there are also noninfectious causes like obesity, alcohol, toxins and metabolic disorders. All of these things can cause liver inflammation and lead to a diagnosis of hepatitis. To learn more about the many causes of hepatitis, check out my short overview.