A *glucometer* is a portable medical device used to measure the *blood glucose (sugar) level* in individuals, especially those with *diabetes*. It provides quick and accurate readings from a small drop of blood, usually obtained by pricking the fingertip with a lancet. Regular use of a glucometer helps people monitor their *glucose control*, adjust *diet*, *exercise*, or *medication*, and prevent complications such as *hypoglycemia* or *hyperglycemia*. It is essential for *self-monitoring*, *dia