Sudden high blood sugar may be associated with improper diet, emotional stimulation, pregnancy, acute pancreatitis and other factors, timely correction of the causes of high blood sugar can generally be cured, if you fail to correct the cause of high blood sugar in a timely manner, long-term high blood glucose may be delayed into a diabetic state, at this time it is generally difficult to recover on their own. 1. Improper diet: If the recent dietary intake of too many carbohydrates, sugary foods, beyond the body’s ability to metabolize sugar, there may be temporary high blood sugar. At this time, we should pay attention to the control and management of the diet, suggest low sugar, low fat diet, reduce the intake of calories, after adjusting 2-4 weeks after the blood sugar can be restored. 2. Emotional stimulation: Bad emotions can easily cause stress, at this time, the body’s secretion of some glucagon increases, which can also lead to fluctuating blood glucose. After adjusting emotions and psychological treatment, blood glucose can return to normal on its own. 3. During pregnancy, especially women who gain weight too fast in late pregnancy are prone to hyperglycemia, which is called gestational diabetes. Most women’s blood sugar can return to normal 2-3 months after delivery, and insulin can be used to lower blood sugar if necessary. 4. Acute pancreatitis, pancreatitis acute inflammation caused by pancreatic islet cell damage can easily cause high blood sugar, after active treatment of pancreatitis after the recovery, blood glucose can generally return to the normal range. If you have high blood sugar, you must consult a doctor in time and follow the doctor’s instructions for examination and treatment.