Hepatitis is swelling and inflammation of the liver. It is not a condition, but is often used to refer to a viral infection of the liver.

Hepatitis can be caused by:

• Immune cells in the body attacking the liver and causing autoimmune hepatitis
• Infections from viruses (such as hepatitis A, B, or C), bacteria, or parasites
• Liver damage from alcohol, poisonous mushrooms, or other poisons
• Medications, such as an overdose of acetaminophen, which can be deadly

For more information about the causes and risk factors for different types of hepatitis, see also:

• Alcoholic hepatitis
• Autoimmune hepatitis
• Delta agent (hepatitis D)
• Drug-induced hepatitis
• Hepatitis A
• Hepatitis B
• Hepatitis C

Liver disease can also be caused by inherited disorders such as cystic fibrosis or hemochromatosis, a condition that involves having too much iron in your body (the excess iron deposits in the liver).

Other causes include Wilson's disease.

Images

Liver anatomy

Hepatitis C

Gianotti-Crosti syndrome on the leg

Hepatitis B virus

Review Date: 11/23/2010
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and George F. Longstreth, MD, Department of Gastroenterology, Kaiser Permanente Medical Care Program, San Diego, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)