According to the triggering cause of fatty liver, if it is alcoholic fatty liver, it is chemical liver injury, and vice versa. Chemical liver injury refers to the destruction of liver cells by toxic chemical substances such as alcohol, drugs and poisons during their metabolism in the liver through blood circulation, thus causing abnormalities in liver function. Fatty liver is a disease characterized by diffuse steatosis of liver cells due to excessive body fat or long-term heavy alcohol consumption, and is divided into alcoholic fatty liver and non-alcoholic fatty liver, alcoholic fatty liver is chemical liver injury and non-alcoholic is not. If the patient has fatty liver, it is recommended to go to the hospital in time, under the guidance of the doctor for targeted treatment.