Causes of obesity: First, genetic factors, parents fat, the chances of children fat will be great, if one parent is obese, children obesity rate will reach about 50%, if both parents are obese, the chances of children obesity will be higher, may be due to the lack of enzymes in the body to break down fat. Second, due to their own reasons, diet is not controlled, not active, usually eat a lot of fat, fried food and sweets, overeating, late-night snacking, staying up late and other bad habits, or lying in bed after meals is not active, lack of exercise, fat accumulation number too much, resulting in obesity. Third, may be fat from childhood, grew up without control, resulting in obesity, obesity will be harmful to the body, such as causing fatty liver, leading to cirrhosis of the liver, transaminases rise, high blood lipids, increase the risk of cardiovascular and cerebrovascular diseases. Obese people, to lose weight by controlling diet and increasing exercise.