The prodromal stage of hepatic coma mainly manifests mild personality changes and behavioral abnormalities, and may have mild fluttering tremor. Hepatic coma, also known as hepatic encephalopathy, is caused by metabolic disorders due to liver diseases such as cirrhosis and dysfunction of the central nervous system, and is mainly manifested by neuropsychiatric symptoms, behavioral abnormalities, and abnormal neural reflexes. According to the degree of clinical manifestations, it can be categorized into stages 0~4. The prodromal stage, i.e. stage 1 hepatic encephalopathy, mainly manifests mild personality changes and behavioral abnormalities, such as euphoria, agitation, anxiety, or apathy, amnesia, sleep inversion, etc., accompanied by mild fluttering tremor. Fluttering tremor refers to the sudden flexion and straightening of the wrist joints when the patient raises the arms and wrists flat, accompanied by rhythmic coarse tremors, similar to the fluttering of wings by a bird. Generally, the prodromal stage is the early stage of hepatic encephalopathy, the symptoms are mostly reversible, and the prognosis is better with timely treatment. It is recommended that patients in the prodromal stage of hepatic encephalopathy should consult a doctor in time and be treated actively.