There are many kinds of hepatitis, and there are many causes of hepatitis. It can be said that some hepatitis is caused by eating. For example, fatty liver is mostly caused by eating high-fat food. Alcoholic liver is caused by drinking a lot for a long time. Hepatitis A and E are infected by eating unclean food and water, and clonorchiasis is caused by eating some fresh water fish slices raw, The other hepatitis is related to heredity or immunity, such as autoimmune hepatitis and hepatolenticular degeneration. The other hepatitis is infected by contact, such as hepatitis B, hepatitis C and hepatitis D, because of various reasons, it is infected by contacting the blood or body fluid with a certain hepatitis virus, Schistosomiasis is caused by direct contact of skin with infected water containing schistosome cercariae.