Re: Why Does Blood Sugar Spike Overnight?
As I understand dawn phenomenon, it occurs because the body senses a low BG during the sleep period, and causes the liver to output glucose to keep the body nourished.
The real question is this. The body tends to develop "set points", and to "set" the "set points" based upon recent history.
This is evidenced by the fact that someone with high BG is hungry.... because a BG of even 250 may be lower than his average. So, the body reacts by wanting to raise it. The same person with well-controlled diabetes
will find himself not hungry at all when his BG is 250, but he will feel hungry as it goes down to 100 if his A1c is 7 (corresponds to an average of about 150).
So, if your average BG is high during the day, the body will react at night to maintain this high average.
Your doctor is betting on lowering your BG average by increasing your sulfonylurea dosage. After time on this drug, the body stores residuals and the output becomes almost "time-released".
In that respect, adding exercise to your regimen, whether done at night or even in the morning, may lower your fasting reading.
The suggestion of diabeticpumper is quite good. I would be interested to know what this result is, and some more data, if you are comfortable to share it here.... such as your recent HbA1c and your 14-day average BG from fingersticks and when you do the sticks.