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The Hidden Hyperglycemia Trigger: When Dehydration Makes Blood Sugar Worse

Person with diabetes reaching for water beside a glucose meter, illustrating how dehydration can worsen high blood sugar.

For people with diabetes, an unexpected glucose spike may have a less obvious cause than food or missed medication. Dehydration and high blood sugar can create a self-reinforcing cycle. When the body loses too much fluid, glucose becomes more concentrated in the bloodstream. At the same time, rising glucose can …

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