Chemical liver injury is usually characterized by symptoms such as loss of appetite, indigestion and vomiting. Chemical liver injury refers to inflammatory liver damage caused by exposure to chemicals, such as common drug liver injury and alcohol liver injury, which are all within the scope of chemical liver injury. Long-term heavy drinking or drug use can cause liver damage, which can be manifested as elevated liver function transaminases or elevated bilirubin. Chemical substances can enter the liver through the gastrointestinal tract through the portal vein or body circulation for transformation, so the liver is vulnerable to chemical toxic substances damage, usually manifested as loss of appetite, indigestion, vomiting, nausea, dry heaves and other symptoms. Normally, we should pay attention to protect the liver and do a good job of daily care. Patients should go to regular hospitals to find out the cause of liver injury and actively treat it under the guidance of doctors, and the earlier the treatment, the better the prognosis.