Fasting blood sugar 7.4mmol/L, not necessarily diabetes. Normal blood glucose is <6.1mmol/L, the patient fasting blood glucose 7.4mmol/L, the first thing to rule out is whether there are some other factors that cause blood glucose elevation. For example, taking some oral drugs that cause high blood sugar, such as glucocorticoids. Secondly, there is no stress hyperglycemia caused by trauma, surgery severe infection and other conditions. After excluding the above factors, you need to re-draw blood to check the fasting blood sugar once. If it is still >7.0 mmol/L, the patient is considered diabetic. A patient with a fasting blood glucose of 7.4 mmol/L needs to determine under what circumstances the patient’s blood glucose was measured and how the blood glucose was measured. Diagnosis of diabetes mellitus can not be based on a single blood glucose as a standard, need to go to the regular hospital to do the regular fasting plasma glucose measurement, if necessary, can also do oral glucose tolerance test to confirm the diagnosis. If you feel unwell, please seek medical advice.