Focal fatty liver, also called focal fatty liver, is a fatty infiltration in a certain area of the liver, which shows focal or patchy changes on CT, ultrasound and other imaging. Focal fatty liver is a special type of fatty liver, and the cause of its development is still unclear. Since the lesions are small in scope, the clinical manifestations are not obvious or only have mild symptoms, which are mostly detected during physical examination. Common manifestations include loss of appetite, nausea, fatigue, mild jaundice, and pain in the liver area. The disease can occur in all age groups, and is more common in middle-aged and elderly people. Focal fatty liver is a reversible disease, so if it is not accompanied by other liver diseases, it can subside on its own in a short period of time. In daily life, following a regular routine, paying attention to maintaining a healthy weight and moderate exercise, and quitting smoking and limiting alcohol can help prevent this disease.