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Patterns in your first five days

Between the first and fifth days with your FreeStyle Libre 2 system or FreeStyle Libre 3 system, you may start to notice small patterns emerging. Here’s a look at when you might see them and what they mean.

Woman relaxing in a swimming pool wearing a LIbre 3 sensor on her arm Woman relaxing in a swimming pool wearing a LIbre 3 sensor on her arm Woman relaxing in a swimming pool wearing a LIbre 3 sensor on her arm Sensor is water-resistant in up to 1 metre (3 feet) of water. Do not immerse longer than 30 minutes.


Common early trends.

As you continue to use your Libre 2 Plus sensor or Libre 3 Plus sensor, you may notice subtle rises or gentle dips in your glucose.

These aren’t grades or judgements; they’re glimpses into how your glucose responds to daily habits.

 


A few patterns you may recognise:

  • Rises in the morning (dawn phenomenon)

  • Meal-time peaks

  • Dips during activity

  • During stress or poor sleep
     

What to know about glucose patterns.

Morning glucose rise (dawn phenomenon).
A small bump before breakfast is normal, known as the dawn phenomenon. This happens when your liver releases glucose to help you wake up1.

Meal-time peaks.
Meals are one of the most revealing parts of your glucose story. How high or how fast your levels change depends on what you eat, how much, and even the pace of your meal2.

Activity dips.
Movement can lower your blood glucose up to 24 hours or more after your workout by making your body more sensitive to insulin3.

Stress or poor sleep.
You might notice steadier highs on restless or stressful days4. It’s your body’s way of asking for rest and recovery.

Each of these moments is an opportunity to learn what helps you stay steady and what throws you off balance.
 

man looking at glucose data on his phone with a visible sensor on his arm man looking at glucose data on his phone with a visible sensor on his arm

Look at your last three days of readings.

On day five, take a moment to look back to see your story in motion. Are there times when your levels feel steady? Times when they swing? That’s useful information, not a grade. You can make progress just by noticing.

Further reading

Understanding hyperglycaemia

⏱ 3 minutes read

Discover what hyperglycaemia is and how to prevent it from happening.

Learn more

Connecting the data

⏱ 4 minutes read

Learn how to use daily and long-term data to make choices about diabetes management.

Learn more

References & Disclaimers

Images are for illustrative purposes only. Not real patients or data.

1. Lavin-Tompkins, Jodi. "Dawn Phenomenon vs. Somogyi Effect: Morning High Blood Sugars Explained." Beyond Type 1. July 30, 2020. https://beyondtype1.org/dawn-phenomenon-vs-somogyi-effect-morning-high-blood-sugars-explained/.

2. American Medical Association. “Foods that spike a patient’s blood glucose are not what you think.”  Accessed January 23, 2026. https://www.ama-assn.org/public-health/prevention-wellness/foods-spike-patient-s-blood-glucose-are-not-what-you-think.

3. American Diabetes Association. “Blood Glucose and Exercise.” American Diabetes Association. Accessed February 12, 2026. 
https://diabetes.org/health-wellness/fitness/blood-glucose-and-exercise.

4. CDC. “About Sleep.” Accessed February 23, 2026. https://www.cdc.gov/sleep/about/index.html.

ADC-2690645 v1.0
 

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