These cycles repeat several times.
As the night progresses, periods of lighter sleep and REM sleep tend to become more prominent.
That means you’re naturally more likely to notice brief awakenings in the second half of the night.
You may wake up for only a few seconds, adjust your position, and fall asleep again without remembering it.
The problem begins when you become fully awake and start thinking:
Why am I awake?
That question can turn a normal brief awakening into a prolonged period of wakefulness.
So waking at 3 A.M. isn’t automatically abnormal.
The important question is what happens afterward.
If you fall back asleep quickly and feel rested the next day, an occasional nighttime awakening may not be a major concern.
2. Stress May Be Keeping Your Brain on Alert
Stress is one of the most common reasons people struggle with sleep.
You may fall asleep quickly because you’re exhausted.
