重症肝炎常由急性黄疸型肝炎或慢性活动性肝炎演变而来。早期诊断,及时治疗可使不少患者抢救过来。然而,重症肝炎的早期临床表现常类似普通肝炎,易误诊或漏诊。重症肝炎病程较短,急性肝坏死常在发病1～2周内出现危重症状,且大多死亡;亚急性肝坏死则在数周或数月(一般为三个月左右)内出现肝昏 Severe hepatitis often caused by acute jaundice hepatitis or chronic active hepatitis evolved. Early diagnosis, timely treatment can make a lot of patients rescued. However, the early clinical manifestations of severe hepatitis are often similar to those of common hepatitis and are often misdiagnosed or missed. Short duration of severe hepatitis, acute liver necrosis often occur within 1 to 2 weeks of onset of critical symptoms, and most of death; subacute hepatic necrosis in a few weeks or months (usually about three months) appear hepatic faint