Dry mouth and skin + itching.
High blood sugar dehydrates the body. Mucous membranes dry out, skin peels and itches, and micro-wounds that are difficult to heal sometimes appear. If you often reach for moisturizer or water by your bed at night, the cause could be high blood sugar.
Cramps or numbness in the feet.
Prolonged excess glucose damages peripheral nerves and circulation. Nighttime cramps, tingling, or burning sensations in the feet are warning signs of diabetic neuropathy, which worsens when glucose levels are high.
Rapid heart rate and restless sleep.
High blood sugar activates the sympathetic nervous system (“fight or flight”): your pulse quickens, your blood pressure rises, and you sweat. So, even if you fall asleep, your sleep remains shallow and fragmented.
Blurred night vision.
High blood sugar alters the fluid balance of the lens and retina, causing temporary fluctuations in vision. If hallway lights appear “halogenated” or objects are blurry when you wake up at night, consult your blood glucose meter.
What to do if you recognize the symptoms?
Measure your blood sugar as soon as you wake up after a nighttime episode.
Record the data in a diary: bedtime, wake-up time, blood sugar measured, food and drinks consumed before bedtime.
Review your evening routine : reduce carbohydrate and salt-rich foods after 7 p.m., limit caffeine and alcohol.
Move after dinner: 10 to 15 minutes of light walking improves glucose absorption.
Consult an endocrinologist – insulin/tablet dosage adjustments or a change in treatment may be necessary.
