Hormonal imbalance
Menopause
Poor sleep habits
Excess caffeine or alcohol
Older adults especially tend to wake earlier because their circadian rhythm shifts naturally with age.
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Blood Sugar Fluctuations Can Interrupt Sleep
Another overlooked reason for waking up during the night is unstable blood sugar. If your blood sugar drops too low while sleeping, your body may release stress hormones like adrenaline and cortisol to stabilize it. This sudden hormonal response can wake you abruptly.
People who skip dinner, eat excessive sugar before bed, or have insulin resistance may experience this more often.
Common signs include:
Sweating at night
Racing heartbeat
Feeling hungry after waking
Difficulty falling back asleep
Eating balanced meals and avoiding heavy sugary snacks late at night may help improve sleep stability.
