A continuous glucose monitor (CGM) device is a small , electronic device that monitors the levels of your blood sugar through the entire day. Certain CGMs will display your current blood sugar level and inform you when it is rising or falling rapidly. Some will require you to check your sugar periodically and the majority will require a finger to adjust. Go through the user's guide to learn what you need to do if you're experiencing high or low level of blood sugar. For continuous glucose monitoring, you should have a diabetic present at all times with you.
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