Stage 4 hepatic encephalopathy indicates that the patient has entered the coma stage and has completely lost consciousness, and the prognosis may be poorer than the first 3 stages, which should be judged comprehensively with the severity of the disease and the causes. Hepatic encephalopathy refers to central nervous system dysfunction, and the causes of the disease are more complicated, which may be related to hemorrhage, potassium deficiency, and acute liver failure, etc. In general, hepatic encephalopathy can be divided into 4 stages. Generally, hepatic encephalopathy can be divided into 4 stages, of which stage 4 of hepatic encephalopathy is the coma stage, when the patient’s consciousness has basically been completely lost. If the patient is not treated, he will gradually develop into a deep coma, which will lead to problems such as decreased muscle tone and dilated pupils, and in serious cases, it may even be life-threatening, so the patient should go to the hospital for treatment as soon as possible. The prognosis of hepatic encephalopathy is related to the severity and cause of the disease. If the disease can be treated as early as possible under the guidance of a doctor, and the triggers are clear and easy to eliminate, then the prognosis is better. However, if the disease is more serious and the causative factors are serious, the prognosis will be worse. Regarding hepatic encephalopathy, patients should try their best to achieve early detection and treatment, actively cooperate with the doctor’s arrangement, and strengthen the daily care and go to the hospital for regular review, so as to better control the development of the disease.