Postprandial blood glucose 19.1mmol / L, beyond the normal range, is a more dangerous situation, may be acute severe metabolic disorders, if the situation is more serious, may be life-threatening. If the postprandial blood glucose 19.1mmol / L, may be acute severe metabolic disorders, such as diabetic ketoacidosis, hyperosmolar hyperglycemic syndrome, diabetic ketoacidosis can be manifested as nausea, vomiting, breathing with rotten apple flavor, severe may be coma. Hyperosmolar hyperglycemic syndrome may also manifest as dehydration, unresponsiveness, drowsiness, and coma. If postprandial blood glucose of 19.1 mmol/L is present and cannot be lowered for a period of time, it is recommended to seek medical attention and follow medical advice for symptomatic intervention.