Obesity includes simple obesity and secondary obesity, the first diagnosis of obesity patients need to do some routine examination to identify the cause of obesity, should come to the clinic on an empty stomach. 1.Physical examination: including height, weight, waist circumference, hip circumference, the presence of skin purple lines, blood pressure and other measurements. 2, blood test: including insulin determination, liver and kidney function, blood sugar, lipid, free fatty acid, nail function, cytokines; combined with menstrual disorders, plus check sex hormones (sit still for half an hour after blood sampling); combined with purple skin, full moon face, buffalo back, plus check cortisol (8:00, 16:00, 0:00 blood sampling).