# When CGMs lie, and when a deep low is really a nice landing

**URL:** <https://forum.fudiabetes.org/t/when-cgms-lie-and-when-a-deep-low-is-really-a-nice-landing/1336>\
**Category:** Flatliners\
**Tags:** cgm, hypoglycemia\
**Created:** [June 28, 2017, 1:06am UTC](https://forum.fudiabetes.org/t/when-cgms-lie-and-when-a-deep-low-is-really-a-nice-landing/1336 "2017-06-28T01:06:06Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Eric](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/eric/32/9209_2.png) [@Eric](https://forum.fudiabetes.org/u/Eric)\
**Post date:** [June 28, 2017, 3:24am UTC](https://forum.fudiabetes.org/t/when-cgms-lie-and-when-a-deep-low-is-really-a-nice-landing/1336/4 "2017-06-28T03:24:12Z")

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> [@Michel](#):
>
> The results are below, and they are shocking

That’s not shocking at all. My Dex is always wrong like that. I will have corrected and be on my way back up and the Dex will be showing me in the 40’s. I am glad other people are noticing this sort of stuff.

While you were gone, a bit of a debate between the value of CGM vs BG:  
[https://forum.fudiabetes.org/t/what-my-dexcom-often-looks-like-when-running](https://forum.fudiabetes.org/t/what-my-dexcom-often-looks-like-when-running)

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