Obesity usually has nothing to do with gender, common causes of obesity include genetic factors, environmental factors, endocrine regulation abnormalities. 1. Genetic factors: obesity has a tendency of family aggregation, most of the primary obesity for polygenic inheritance, is a variety of microeffective gene action superimposed effect, such as the amount of body fat and obesity-related genes, nigrosocortin-4-receptor genes and so on. 2. Environmental factors: is the main reason for the increase in the prevalence of obesity, mostly due to increased caloric intake and reduced activity. In addition to the increase in caloric intake, diet structure also has a certain impact, fat is more likely than sugar to cause fat accumulation in the body, resulting in overweight or obesity. 3. Abnormal endocrine regulation: the hypothalamus is the key to the body’s energy balance regulation, in which the hypothalamus arcuate nucleus has a variety of appetite-regulating neurons, peripheral circulation involved in energy metabolism hormones, including leptin, insulin, cortisol, etc., which any part of the abnormality, can lead to obesity. If obesity occurs, it is recommended to seek early medical attention to clarify the cause, and at the same time, under the guidance of a professional physician to achieve scientific and gradual weight loss through nutrition, exercise or medication and other comprehensive management.