The purpose of using arginine in patients with hepatic encephalopathy is mainly to utilize arginine to bind free ammonia in order to lower blood ammonia and thus improve hepatic encephalopathy. Hepatic encephalopathy occurs due to abnormalities in the body’s liver function, resulting in abnormal metabolism of blood ammonia. When blood ammonia exceeds the body’s ability to metabolize it, ammonia toxicity can result, leading to hepatic encephalopathy. The administration of arginine can bind the free ammonia in the body, thus lowering the blood ammonia to improve the situation of hepatic encephalopathy. When hepatic encephalopathy occurs, it is necessary to actively seek medical treatment and carry out standardized treatment under the guidance of professional doctors to avoid delaying the treatment time and causing adverse consequences.