Fatty liver disease is a condition where fat accumulates in the liver cells, causing inflammation and often leading to cirrhosis. Symptoms of fatty liver disease include fatigue, abdominal pain, loss of appetite, nausea and vomiting. Some people may also experience jaundice (yellowing of the skin), itching, or dark urine. Additionally, those with fatty liver disease may experience weight gain or unexplained weight loss because of their condition. In some cases, complications such as abdominal swelling or fluid collection in the abdomen may occur due to an enlarged liver caused by fatty liver disease.