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Message: <blockquote data-quote="Melgar" data-source="post: 2717288" data-attributes="member: 520626">Hi and welcome to the forum [USER=590900]@Sene[/USER]. We have a great community here, with a lot of knowledgeable  members who are more than happy to answer any questions you may have. If you don’t mind me asking, what are your blood sugar readings?As for the different readings , there are a number of reasons this could be happening. Firstly, the CGM device has some accuracy issues for the first 24 hours, whilst the sensor filament ‘beds in’.Many members will attach a sensor 24 hours before the last sensor has finished. This is to allow the filament to settle. The sensor does settle down.Secondly, your glucose meter analyze your blood sugar directly from your blood, whereas the CGM analyzes the blood sugar in your in interstitial fluid, which is the fluid around your cells. There is a time lag with the CGM, so it’s always going to be behind your finger prick readings. So that could account for the difference, especially if your blood sugars are rising or falling . And thirdly, your blood sugar measuring devices  have a 15% +/- allowable error against a lab device. Given the 15%-/+ allowable error , this can also account for the discrepancies.Out of the two devices, I would always take the finger prick over my CGM devise. Mel</blockquote>

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