If the environmental trigger happens around the same time every night, the awakening may also occur at roughly the same time.
Temperature Matters
Your body temperature naturally changes during sleep.
A bedroom that becomes too warm or too cold can make it harder to remain asleep.
Some people are particularly sensitive to temperature changes.
For example, you might fall asleep comfortably in the evening when the room is cool, but wake several hours later after becoming too warm under blankets.
Similarly, sweating or feeling chilled can interrupt sleep.
Creating a comfortable, consistent sleeping environment can help reduce these disruptions.
Alcohol Can Affect the Second Half of the Night
Another commonly overlooked factor is alcohol.
Some people feel that alcohol helps them fall asleep more quickly.
While it can make you feel drowsy initially, alcohol can interfere with normal sleep patterns later in the night.
As its effects wear off, sleep can become more fragmented.
