Is your vision blurry for no reason? High blood sugar can change the shape of the lens and affect vision. If this happens regularly, talk to your doctor.
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Difficulty concentrating
A brain that lacks fuel (glucose misused) functions in slow motion. The result: concentration problems, mental fatigue and a feeling of being “in the fog” .
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Dry mouth

A dry mouth, often accompanied by intense thirst, may indicate that your body is losing too much fluid due to the elimination of sugar through urine.
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Erectile dysfunction (in men)
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Over the long term, excess sugar can damage the blood vessels and nerves responsible for erections. This is a sign that should not be underestimated.
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Frequent infections

High blood sugar weakens the immune system, promoting urinary tract, skin, and recurring infections. If you’re getting sick often, this is a warning sign to listen to.
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Slow-healing wounds

Is your injury taking longer to heal? This may be related to poor blood circulation, which is typical in people with high blood sugar.
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