Fatty liver cannot be detected by blood tests, but venous blood tests are usually done to check liver function and lipid biochemistry. Patients with fatty liver may have elevated liver function and elevated lipids, but other liver diseases may also cause elevated indicators, such as viral hepatitis, alcoholic liver disease or other causes of liver disease. Fatty liver is usually diagnosed by abdominal ultrasound, liver ultrasound can understand whether there is fatty liver, the most accurate method is liver puncture biopsy, but biopsy is an invasive test, so basically people do not accept, usually through the abdominal ultrasound combined with venous blood, and the patient’s clinical symptoms, can be concluded whether there is fatty liver.