BMI is not the higher the better, BMI should be maintained within the normal range, more than the normal range is too high is not conducive to good health. BMI refers to the body mass index, referred to as the body mass index, is commonly used internationally to measure whether the human body is healthy and the degree of fat and thin standard. In general, the normal value of BMI between 18 and 24, BMI more than 24 for overweight, BMI more than 28 for obesity. BMI over the normal value, the incidence of coronary heart disease and stroke will also rise, overweight and obesity is coronary heart disease and stroke onset of an independent risk factors. BMI over the normal value, suffering from hypertension, diabetes and dyslipidemia and other chronic diseases, the probability of the incidence of disease will also rise significantly. BMI is not the higher the better, nor the lower the better, it is recommended to control within a reasonable range, if there is confusion about weight, it is recommended to go to the hospital in a timely manner, under the guidance of the doctor reasonable treatment.