Physical examination found high blood sugar, exercise to lower down, can not be sure whether it is diabetes, because exercise is supposed to consume energy faster, can lower blood sugar, and physical examination randomly once found elevated blood sugar does not indicate too much of a problem. There are many factors that can cause an increase in blood sugar, such as lifestyle habits, hormone levels, stress or trauma, exercise, etc. Therefore, to determine whether the elevated blood glucose is diabetes, you need to go to the hospital to complete the relevant examinations and be diagnosed by an endocrinologist. The criteria for the diagnosis of diabetes mellitus are: diabetic symptoms plus fasting blood glucose value of more than 8 hours of fasting ≥ 7.0 mmol / L; or 2 hours after the oral glucose tolerance test blood glucose ≥ 11.1 mmol / L; or at any time of the blood glucose ≥ 11.1 mmol / L. If the symptoms of diabetes mellitus are not obvious and only one blood glucose value reaches the diagnostic criteria for diabetes mellitus, it is necessary to monitor the blood glucose again on the next day to exceed the diagnostic criteria in order to confirm the diagnosis of diabetes mellitus. If you find elevated blood glucose, it is recommended to go to the local regular hospital to receive professional medical treatment, strict control of blood glucose, do not delay, so as not to delay the condition.