Stress and anxiety are among the most common reasons for waking during these early morning hours. During quiet moments, the mind becomes more active and unresolved worries can surface. Even if someone falls asleep easily, emotional tension can cause the brain to partially wake in the early morning. This is why people under long-term stress often report waking at the same time every night.
Another important factor is blood sugar regulation. During the night, the body continues to manage glucose levels. If blood sugar drops too low, stress hormones like cortisol and adrenaline can be released to stabilize it. These hormones can also stimulate alertness, causing sudden awakening.
