Fatty liver sonograms indicate possible fatty liver disease. The characteristic of significant attenuation of ultrasound propagation in adipose tissue can be utilized clinically to quantify the degree of hepatic steatosis and thereby diagnose fatty liver disease with an accuracy of 70% to 80%. Fatty liver disease is categorized into simple fatty liver disease and alcoholic fatty liver disease. The development of simple fatty liver disease is mostly related to lifestyle such as high-energy diet, sugary drinks, sedentary lifestyle, obesity, type 2 diabetes and hyperlipidemia. Unhealthy lifestyle and insulin resistance lead to massive deposition of lipids in liver cells, while psychological stress and immune dysfunction also play a role in causing the disease. Patients with simple fatty liver disease can usually recover after active treatment, but they should control their diet and actively exercise to improve their unhealthy lifestyle. Alcoholic fatty liver disease is mostly caused by heavy drinking, and as the disease progresses, it can develop into alcoholic fatty liver, alcoholic liver fibrosis, cirrhosis, and even liver cancer. When suffering from alcoholic fatty liver disease, you should quit drinking and seek medical treatment in time to prevent the disease from progressing seriously.