Blood glucose 63mmol/L is not normal, very high and should be treated immediately. Clinically, fasting blood glucose 3.9-6.0mmol/L is normal, and 2-hour postprandial blood glucose less than 7.8mmol/L is normal. Blood glucose 63mmol/L is very high and may cause serious complications such as hyperosmolar coma, diabetic ketoacidosis, lactic acidosis, electrolyte disorders, and even life-threatening, requiring hospitalization as soon as possible. For severe hyperglycemia, insulin should be used for continuous intravenous input to control blood glucose to the normal range as soon as possible, and at the same time, attention needs to be paid to rehydration to correct the hypertonic state and avoid shock. It is recommended that patients seek timely medical treatment, and specific treatment should be carried out under the guidance of a doctor.