# Libre 3 Plus showing Wide Swings **URL:** \ **Category:** T1D Tech & Daily Management Support\ **Created:** [January 17, 2026, 1:29am UTC](https://forum.breakthrought1d.org/t/libre-3-plus-showing-wide-swings/75042 "2026-01-17T01:29:42Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Dave52](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.breakthrought1d.org/dave52/32/5473_2.png) [@Dave52](https://forum.breakthrought1d.org/u/Dave52)\ **Post date:** [January 17, 2026, 1:29am UTC](https://forum.breakthrought1d.org/t/libre-3-plus-showing-wide-swings/75042/1 "2026-01-17T01:29:42Z")
Greetings All & Happy New Year, I’m aware of the false low readings with Libre, and the expected difference between finger pricks and CGM values, I believe this is different. This morning I had a CGM of 100, 20 minutes later 220, all I did was doing was watching TV. I checked with a finger prick and it was 90. I ate breakfast 200 calories Cherrios and milk. 30 minutes later I got a “Hi”from Libre, blood was 146. 2 hours later I got a “Low” alert from the Libre, finger prick was 135. So, all day I had huge swings from the Libre. Blood tests showed normal changes. 10 minutes ago Libre 155, blood 76. Has anyone else had these swings from Libre? Luckily I had an extra sensor so I started it. TIA, Dave ---
**Author:** ![Dennis](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.breakthrought1d.org/dennis/32/5527_2.png) [@Dennis](https://forum.breakthrought1d.org/u/Dennis)\ **Post date:** [January 17, 2026, 1:59pm UTC](https://forum.breakthrought1d.org/t/libre-3-plus-showing-wide-swings/75042/2 "2026-01-17T13:59:31Z")
Dave @Dave52 , it certainly sounds as if you had a significantly defective sensor. And really good that you were aware of what your body was telling you - you did well in managing your diabetes effectively, the “old fashioned way” and not assuming that the sensor is a plug-n-play. If you haven’t done so yet, this should be reported to Abbott along with your excellent documentation. ---
**Author:** ![JonR](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.breakthrought1d.org/jonr/32/5473_2.png) [@JonR](https://forum.breakthrought1d.org/u/JonR)\ **Post date:** [July 25, 2026, 5:13pm UTC](https://forum.breakthrought1d.org/t/libre-3-plus-showing-wide-swings/75042/3 "2026-07-25T17:13:58Z")
Long time TD1 with pumps and CGS. Been using Libre 3+ for 4 months. Last one started multiple random abrupt drops (80 plus) and then a slower recovery over half an hour. Not food or exercise caused. After 3 similar episodes, I removed the sensor and found I had an infection at the cannula site under the adhesive. Put a new sensor on and all is well. Infection\ pimple healed without treatment.