Obesity, that is, overweight, body shape change, its specific performance is as follows: 1, secondary obesity: other disease causes obesity, such as pituitary tumor, polycystic ovary syndrome, hypothyroidism, diabetes, due to human endocrine disorder, prone to local obesity, such as Cushing’s syndrome performance for the chest, waist, back hypertrophy, limbs relatively thin body type; 2, primary obesity: no disease, simple obesity, overweight, but the distribution of body fat is more uniform, belong to uniform obesity.