If the fasting blood glucose before breakfast is 6.22 mmol/L, then it is considered to be prediabetes; if it is the blood glucose before lunch or dinner, it may be normal or prediabetes depending on the situation. Clinically, fasting blood glucose and 2-hour postprandial blood glucose are mostly used as assessment indicators. Fasting blood glucose 3.9-6.0mmol/L is normal, 6.1-6.9mmol/L is impaired fasting blood glucose regulation (belonging to pre-diabetes), ≥7.0mmol/L at the same time diabetes symptoms can be diagnosed as diabetes. So the fasting blood glucose before breakfast is 6.22mmol/L, considering pre-diabetes. Normally, blood glucose three to four hours after a meal should be close to fasting blood glucose. If the blood glucose is 6.22mmol/L before lunch and dinner, it may be normal or high, and it is recommended to improve the fasting blood glucose and 2-hour postprandial blood glucose and other related examinations. When blood sugar is abnormal, it is recommended to consult a doctor in time and standardize the treatment.