There are two main types: non-alcoholic fatty liver disease (NAFLD), linked to obesity and poor lifestyle, and alcoholic fatty liver disease, caused by excessive alcohol use. NAFLD is the most common and often shows no symptoms early on, but can lead to fatigue, abdominal discomfort, and liver inflammation as it progresses.
If untreated, it may develop into more serious conditions like NASH, fibrosis, cirrhosis, or liver cancer. Diagnosis is done through blood tests, imaging, or liver biopsy.