Definition

A common condition in which fat builds up in the liver. In most people, fatty liver disease does not cause any symptoms or serious liver problems. However, in some cases, it can cause liver inflammation and damage to the cells in the liver. The two main types of fatty liver disease are alcoholic fatty liver disease (AFLD) and nonalcoholic fatty liver disease (NAFLD). AFLD occurs in people who drink large amounts of alcohol. NAFLD occurs in people who drink little or no alcohol. It usually affects middle-aged and older adults but is becoming more common in children and teens. It is especially common in people who are overweight or who have obesity, diabetes, or high levels of cholesterol and triglycerides (a type of fat) in the blood. A severe form of NAFLD called nonalcoholic steatohepatitis can cause cirrhosis (scarring of the liver) that may lead to liver failure or liver cancer.