A blood glucose monitor is a medical device used to measure the level of glucose in a person's blood. It is commonly used by individuals with diabetes to help manage their condition. The device typically requires a small drop of blood, which is obtained by pricking the skin with a lancet. The blood is then placed on a test strip, and the monitor provides a reading of the glucose level. These monitors can vary in features, including the ability to store readings, connect to smartphones, or provide alerts for high or low glucose levels. Regular monitoring helps individuals make informed decisions about their diet, exercise, and medication, ultimately aiding in better blood sugar control.