Blood glucose is mainly related to the following factors: First, it has a lot to do with the food you eat, for example, if you eat fruits, snacks and rice with high sugar content, your blood glucose will be higher; if you don’t eat staple food, and you simply eat some vegetables or protein food, your blood glucose will be low. Secondly, if you are a diabetic, it is possible that the dosage of hypoglycemic drugs or insulin may cause your blood sugar to be high or low. Third, the blood glucose may be high or low with the use of blood glucose measurement method has a relationship, many patients are currently using the blood glucose meter test, blood glucose meter is divided into domestic and imported, the quality of each type of blood glucose meter are not the same, the determination of blood glucose may also have errors, resulting in blood glucose appears high or low.