A morning fasting blood sugar of 9.4mmol/L is serious. Under normal circumstances, the normal value of fasting blood glucose is generally between 3.9~6.1mmol/L, when the fasting blood glucose is in this range, it is a normal range. In general, if the fasting blood glucose ≥ 7.0mmol / L, can reach the diagnostic criteria for diabetes, and the current fasting blood glucose has reached 9.4mmol / L, need to be combined with the patient’s current clinical symptoms, such as there are three more and one less symptom (drink more, eat more, urinate more, weight loss), or again review the fasting blood glucose, if the results of the examination is still ≥ 7.0mmol / L, can be diagnosed as diabetes. In addition, it is recommended that patients with fasting blood glucose of 9.4 mmol/L should go to the hospital in time and follow the doctor’s instructions for treatment to avoid delaying their condition.