"Fatty liver" is a finding that is extremely common in the US population - it is primarily caused by the same factors that result in "prediabetes" and type 2 diabetes and often tied to metabolic syndrome .It isn't a disease, per se, although often called "fatty liver disease" ( or sometimes "fatty liver steatosis") - it is an umbrella term for having more fat than normal in your liver. Most people extra fat in their liver don't have symptoms but some people do , including fatigue and enlarged liver. It can progress but the opposite is also possible! Weight loss, a healthy diet and exercise are key! Good luck.