why my fasting sugar is high during pregnancy Why is my blood sugar high in the morning after fasting?
Do you often wake up in the morning with high blood sugar levels, even if you haven’t had anything to eat or drink all night? If so, you’re not alone. Many people experience high fasting blood sugars for various reasons. In this post, we will explore some possible explanations for this phenomenon and offer some tips on how to manage it.
4 Reasons for High Fasting Blood Sugars

High fasting blood sugars can be attributed to several factors. Let’s take a look at four of the most common ones:
- Dawn Phenomenon

Dawn phenomenon, also known as “dawn effect,” refers to the natural hormonal changes that occur in the body during the early morning hours. This can lead to an increase in blood sugar levels, even without food intake. The rise in hormones, such as cortisol and growth hormone, can cause the liver to release glucose, resulting in elevated blood sugars.
- Somogyi Effect
Another possible cause of high fasting blood sugars is the somogyi effect. This occurs when blood sugar levels drop too low during the night, triggering the release of counter-regulatory hormones, such as glucagon and epinephrine. These hormones stimulate the liver to produce more glucose, causing a rebound effect and leading to high blood sugar levels in the morning.
- Insufficient Basal Insulin
If you are using insulin therapy, it’s essential to ensure you have the right basal insulin dose. Basal insulin is the long-acting insulin that helps maintain steady blood sugar levels throughout the day and night. If you have insufficient basal insulin, your blood sugars may rise during the fasting period.
- Medications and Medical Conditions
Some medications, such as corticosteroids and certain antidepressants, can contribute to high blood sugar levels. Additionally, medical conditions like sleep apnea, which affects breathing during sleep, can also lead to elevated fasting blood sugars.
Tips for Managing High Fasting Blood Sugars
If you find yourself consistently waking up with high blood sugar levels, here are some tips that may help:
- Check your bedtime snack: Having a balanced snack before bed, consisting of protein and healthy fats, can help stabilize your blood sugars throughout the night.
- Adjust your medication or insulin dose: Consult with your healthcare provider to determine if any adjustments to your medication or insulin dose are necessary to better control your fasting blood sugar levels.
- Consider lifestyle modifications: Incorporating regular exercise into your routine and following a balanced diet can have a positive impact on your overall blood sugar control, including your fasting levels.
- Manage stress levels: Stress can affect blood sugar levels. Find healthy ways to manage stress, such as practicing relaxation techniques or engaging in activities you enjoy.
Remember, everyone’s body is different, and what works for one person may not work for another. It’s essential to work closely with your healthcare team to develop an individualized plan that meets your specific needs.
We hope you found this information helpful in understanding why your blood sugar may be high in the morning after fasting. Take control of your diabetes management and reach out to your healthcare provider for personalized guidance.
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