The reasons for the formation of high blood sugar may be related to the following points: First, due to alcohol consumption, drinking alcohol will reduce the diet and increase satiety, but the absorption and metabolism of alcohol is faster, and it can’t maintain the blood sugar level for a longer period of time, so it will lead to the elevation of blood sugar. Second, due to taking certain hormone drugs, such as prednisone, dexamethasone, etc., may cause high blood sugar. Third, too much pressure, emotional and mental stress, emotional ups and downs fluctuations are too large, these will make the body of certain organ function can not be normal play, resulting in internal environmental disorders, so that the blood sugar rise. Fourth, due to improper diet, eating too much, especially sweets and sugary drinks, so that the body’s sugar content is significantly higher than the normal standard, but also the formation of fat in the blood to increase, resulting in elevated blood sugar. Fifth, due to the sudden reduction of exercise, if due to the sudden reduction of exercise, resulting in insulin can not play an effective role, so the phenomenon of elevated blood glucose will also occur. Sixth, genetic background.