Written by: Ehsan Siddiqui
4 June 2026
Managing your blood sugar starts with trusting your device. But how can you tell if those daily glucometer numbers are actually accurate or quietly misleading your health decisions?
Photo Credit: Magnific
The biggest clue is your own body. If your glucometer shows a dangerously high or low reading but you feel perfectly normal, the device might be giving a false number.
Photo Credit: Magnific
If you test your blood sugar and get a strange result, testing again immediately should give a similar number. Vastly different back-to-back readings indicate a device error.
Photo Credit: Magnific
Various testing kits come with a special control solution. If you suspect false numbers, test this liquid instead of blood to clearly check if the meter itself is functioning correctly.
Photo Credit: Magnific
Bring your meter to your next doctor visit. Test your blood right after they draw a lab sample. If your device differs greatly, it might need to be replaced immediately.
Photo Credit: Magnific
Modern glucometers will often warn you. If your screen constantly shows random error messages instead of numbers despite using fresh strips, the internal sensor is likely failing.
Photo Credit: Magnific