Diabetes can develop silently for months or even years before a diagnosis is made, yet the body often sends detectable warning signals well before complications arise. Seven early symptoms — from frequent urination to unexplained weight loss — have been identified as potential indicators of elevated blood sugar or prediabetes. Recognizing them early and seeking a blood test can significantly reduce the risk of long-term damage to the heart, kidneys, eyes, and nerves.
In brief
- —Diabetes can go undetected for months or years
- —Seven physical signs may point to high blood sugar
- —A blood glucose or HbA1c test can confirm the diagnosis
Frequent urination and constant thirst: the two most common first signals
One of the earliest and most recognizable signs of diabetes is needing to urinate more often than usual, particularly during the night. When blood sugar rises, the kidneys work harder to filter excess glucose from the bloodstream, drawing more water into the urine and increasing both its frequency and volume.
This fluid loss almost inevitably triggers persistent thirst. Even after drinking large amounts of water, the sensation returns quickly because the body continues losing fluids through increased urination. The combination of these two symptoms together is considered a classic early warning pattern of elevated blood sugar.
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