Fasting blood glucose 6.24mmol/L is high and abnormal for normal people; it is within the target range and normal for diabetic patients. 1. The normal value of fasting blood glucose for normal people is between 3.9 and 6.1 mmol/L, so fasting blood glucose of 6.24 mmol/L is on the high side, and it is recommended to consult an endocrinologist for a clear diagnosis. 2. For patients who have been diagnosed with diabetes mellitus in the past, fasting blood glucose should be controlled between 4.4~7.0mmol/L. Therefore, fasting blood glucose of 6.24mmol/L has reached the target of control, and the current treatment program can be continued. Diabetic patients are advised to maintain a regular diet, control the total calorie content of food, and engage in regular outdoor exercise to help control blood glucose. Once elevated blood glucose levels are detected, prompt medical consultation is recommended.