There is an association between fatty liver and obesity. Obesity is a high risk factor for the formation of fatty liver, because fatty liver is associated with high fat, high sugar, high calorie, alcohol intake, less exercise, as well as risk factors for obesity, so obesity is associated with fatty liver. Fatty liver is a diffuse steatosis of the liver, that is, the liver has more fat, fat may be caused by obesity, because obesity is not only subcutaneous accumulation of fat, the viscera will also have the accumulation of obese patients with blood lipids are often elevated and thus aggravate the lipid metabolism of the liver, the long-term high load of lipid metabolism will affect the function of the liver, which can easily lead to fatty liver. The relationship between fatty liver and obesity is complex, timely medical treatment, by the doctor to identify the cause of the clear diagnosis, guidance and treatment, do not delay the condition, so as not to cause adverse consequences.