A blood sugar fasting of 14.5mmol/L is in the high range and may be dangerous, and active treatment under medical supervision is recommended. In general, the normal value of blood glucose fasting for a healthy organism is 3.9-6.1mmol/L. If the blood glucose fasting test value reaches 14.5mmol/L, it indicates that the organism’s blood glucose fasting value is seriously over the limit. For those with diagnosed diabetes, it means that the patient may not have good dietary control, and long-term poor control of blood glucose may cause complications of diabetes, such as diabetic foot, diabetic ketoacidosis, or easy to secondary urinary tract infections, lung infections, skin infections and other states. For people with undiagnosed diabetes, blood sugar twice the normal value is more serious. Regular testing of fasting and 2 hours after three meals is recommended to understand the fluctuation of blood glucose. If not checked, intervened and controlled in a timely manner, it may damage several systems of the organism, leading to chronic lesions, functional decline, and even life-threatening conditions in organs such as the kidneys, eyes, heart, nerves, and blood vessels. Both diagnosed and undiagnosed diabetics should be intervened and controlled early. Most patients need to take glucose-lowering drugs, such as gliclazide extended-release tablets and metformin. If patients are not effective in taking glucose-lowering drugs, insulin injection can be used as an alternative treatment. In conclusion, patients are advised to measure their blood glucose regularly, pay attention to diet and rest, insist on exercising to strengthen immunity and consume excessive sugar, and seek medical attention when they find abnormal blood glucose levels.