Liver function is usually not normal during acute hepatitis B infection. Hepatitis B acute infection refers to the body infected with hepatitis B virus, hepatitis B virus will reproduce and replicate in the body, resulting in an immune response will cause damage to the liver is not able to clear the hepatitis B virus. Hepatitis B acute infection with the increase in the amount of virus, liver function damage will be greater easily lead to alanine aminotransferase ALT, glutamic oxal transaminase AST and other indicators of elevation, in the acute phase of the two values are usually as high as 1,000-2,000U / L, and ALT is higher than the AST. and then appeared fatigue, anorexia, discomfort in the liver area, fever, and severe jaundice may also have symptoms. Continuous elevation of serum ALT for more than 6 months suggests that the disease has progressed to chronic hepatitis. Further examination in the hospital is needed for timely intervention and treatment so as not to aggravate the damage to the liver.