Testing one’s own blood glucose level, if the amount of drinking water is not very large, will not affect the results of testing blood glucose, so it usually does not lead to high or low results of testing blood glucose. Because when testing the blood glucose of fasting and 2 hours after eating, fasting blood glucose requires 8-10 hours, if you can do not drink water for a long time, you can also prohibit drinking for 8-10 hours. If you can’t do it for a long time, you can drink a small amount of water before the blood glucose test, and it won’t affect the blood glucose results. For example, for liver function and lipid level tests, it is recommended to fast for 8-10 hours to ensure accurate test results.