A blood glucose meter is a small, portable device used to measure the level of glucose in a person's blood. It is commonly used by individuals with diabetes to monitor their blood sugar levels. 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 inserted into the meter, which provides a reading within seconds. These meters help users manage their condition by providing real-time data on their blood glucose levels. Regular monitoring can assist in making informed decisions about diet, exercise, and medication, ultimately helping to maintain better overall health.