“What causes high blood sugar in the morning?”

Diabetes Type 2

This is called impaired fasting glucose, and you will have to be screened for diabetes.

https://www.medicalnewstoday.com/articles/317444#dawn-phenomenon

Here is an article that you might find interesting! Best of luck!

You might need some better sugar control, recommend endocrinologist evaluation.

Without knowing whether you have diabetes or not (I'm going to assume yo do and it is Type 2 Diabetes from your age), there can be several causes of high BS in this case. I will list 3. 1) Your medicines may not be right. The doses may be too low, they may not be working, or they may not be lasting through the night. 2) The medicines may be too high at night & are causing low BS with rebound to higher values caused by the liver pouring out stored sugar to keep the brain functioning. 3) A common cause of this is known as the "Dawn phenomena". BS drops during the night & that is normal, but in some people, the insulin level must go up in order to keep the BS down. This is caused by the secretion of cortisol & human growth hormone that is the normal event that wakes us up & gets us going in the morning. Growth hormone & cortisol are "counter-regulatory hormones that raise BS so a peak can occur in these people in the morning. There are ways to check what the cause is so see your Dr. and set up these tests the correct it. It can often be corrected by a simple change in meds or the timing of taking the meds. It can be fixed.

Hi!
You may want to take your blood sugar log to your PCP and have further evaluation to get the right diagnosis. Normal Diurnal variation of Cortisol and other hormones protect our bodies from suffering low sugars - These episodes can cause early morning high sugars (Dawn phenomenon) - so determining the timing of the test along with other determinants is important in this context.

How high? Might be diabetes, but need more information to be able to answer the question.

Hi, I am sure this is frustrating for you, especially if you are trying to avoid further medications and or intervention to avoid and/or manage diabetes. This often requires a deeper evaluation by your care provider and should not be ignored.

Some of the most common causes of elevated fasting blood sugars upon waking can be linked to endocrine disruption (adrenal and thyroid issues), sleep apnea (obstructive or central forms) or blood sugar dysregulation as a consequence of diet and or lifestyle choices.

Elevated blood sugars in the morning can be related to what you ate at night or how late you may have eaten. Also, a restless night can increase cortisol levels which can increase your morning blood sugar levels.