A glucometer is an instrument that is used by people with diabetes to check their glucose at home. It saves them from the effort of going to a lab and getting their tests done every time and the results are also available within seconds. At any point, if you are experiencing symptoms of highs or lows, having a glucometer in handy at home would be beneficial. It would equip you to deal with any immediate symptoms and bring the sugar levels to the optimal range. Too many undiagnosed or untreated highs or lows can cause complications in the future. A glucometer and self-monitoring of blood glucose can reduce the likelihood of that happening.