Impaired fasting blood glucose, also known as pre-diabetes, can effectively delay or even reverse the onset of type 2 diabetes if treated with timely intervention, but if the condition is neglected, it can cause diabetes at any time and cannot be generalized. Impaired fasting glucose is a reversible stage, if early intervention and treatment, including diet, exercise and even medication, to control blood glucose to within the normal range, can prevent diabetes and reduce the probability of morbidity. However, if impaired fasting blood glucose is detected without timely intervention and treatment, poor blood glucose control and relatively large fluctuations and ups and downs, this situation may be transformed into diabetes at any time, but the specific time should be decided in conjunction with the patient’s personal situation and the progress of the disease. Patients with impaired fasting glucose should be actively treated under the guidance of a physician.