When you're stressed, your blood sugar levels rise.
Stress hormones like epinephrine and cortisol kick in since one of their major functions is to raise blood sugar to help boost energy when it's needed most.
Think of the fight-or-flight response.
You can't fight danger when your blood sugar is low, so it rises to help meet the challenge.
Both physical and emotional stress can prompt an increase in these hormones, resulting in an increase in blood sugars.
People who aren't diabetic have compensatory mechanisms to keep blood sugar from swinging out of control.
But in people with diabetes, those mechanisms are either lacking or blunted, so they can't keep a lid on blood sugar.
When blood sugar levels aren't controlled well through diet and/or medication, you're at higher risk for many health complications, including blindness, kidney problems, and nerve damage leading to foot numbness, which can lead to serious injury and hard-to-heal infections.
Prolonged elevated blood sugar is also a predecessor to cardiovascular disease, which increase the risk of heart attacks and strokes.
"In diabetes, because of either an absolute lack of insulin, such as type 1 diabetes, or a relative lack of insulin, such as type 2, there isn't enough insulin to cope with these hormones, so blood sugar levels rise," says Richard Surwit, PhD, vice chairman of the department of psychiatry and behavioral sciences at Duke University Medical Center and author of The Mind Body Diabetes Revolution.
Anything upsetting like going through a breakup or being laid off is certainly emotionally draining. Being down with the flu or suffering from a urinary tract infection places physical stress on the body.
It's generally these longer-term stressors that tax your system and have much more effect on blood sugar levels.
The problem may be compounded because under these pressures, you may lose your appetite and skimp on eating, or reach for not-so healthy quick fixes like candy or chips.
Some people actually "stress eat" (overeat during stressful periods).
Others skip their daily workout because they're too strained or run down to keep it up, which can create a vicious cycle since exercise is an excellent way to lower blood sugar.
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