Blood sugar fasting 14 points more mmol / L is generally more serious, it is recommended to seek medical attention to clarify the cause of elevated blood sugar. It may be a transient elevation caused by stress, infection and other conditions, or it may be a diabetes-induced elevation of fasting blood glucose. Fasting blood glucose is an important indicator for diagnosing blood glucose metabolism disorder, the normal value is 3.9~6.1mmol/L. Diabetes can be diagnosed when fasting blood glucose is ≥7.0mmol/L, and there are three more and one less symptom (drinking, eating, urinating and weight loss). Fasting blood glucose 14 points more mmol / L has been seriously out of the normal range, if the diabetes caused, it is recommended to follow the doctor’s instructions to take glucose-lowering program treatment, you can take oral acarbose, metformin and other glucose-lowering drugs or injections of insulin treatment, to avoid the occurrence of diabetic ketoacidosis, hyperglycemic hypertonic state, microvascular complications and neurological complications. It is recommended that patients with fasting blood glucose of more than 14 mmol/L should go to the endocrinology department of regular hospitals in time to improve the relevant examinations and standardize the treatment under the guidance of the doctor, so as to avoid delaying the condition or leading to adverse reactions.