A waist circumference greater than or equal to 85 centimeters for men and 80 centimeters for women is usually considered obese. There are many ways to detect obesity, but now the international common indicator of obesity is BMI, the formula of BMI is weight (in kilograms) divided by the square of height (in meters). If the calculated BMI value is within the range of 18.5 to 23.9, then the person’s weight belongs to the normal range. If the BMI is 24 to 27.9, the person is overweight, and if the BMI is greater than or equal to 28, the person is obese. However, BMI cannot accurately describe the distribution of body fat, nor can it distinguish between fat and muscle content, and muscular people are often easily diagnosed incorrectly. Obesity can cause elevated blood lipids and blood sugar, which may lead to hyperglycemia, hyperlipidemia, hypertension and other diseases, which have a certain impact on cardiovascular and cerebrovascular diseases and may increase the risk of coronary heart disease, stroke and other diseases. Patients are advised to control their weight in time. If necessary, they can go to regular hospitals for examination to clarify the causes of obesity and lose weight as soon as possible. If the purpose of weight loss cannot be achieved by controlling diet and increasing exercise, professional medical help can be sought.