Why you wake at 3am — and how to fix it

Waking in the small hours is one of the most common complaints we hear. It rarely means something is wrong with you. In most cases it reflects the normal architecture of a night's sleep meeting a few habits that are easy to change.

What is actually happening

Deep sleep is front-loaded. By roughly the middle of the night, the pressure that pushed you into deep sleep has largely been spent, and your remaining sleep is lighter and dream-heavy. Brief awakenings at these transitions are normal — you usually forget them. The problem starts when something keeps you awake once you surface.

The usual culprits

• —Alcohol in the evening, which fragments the second half of the night
• —A bedroom that warms up as the night goes on
• —Late caffeine still circulating past midnight
• —Anxiety about the clock, which turns a 30-second wake-up into an hour
• —Untreated sleep apnea, which can wake you repeatedly without you noticing why

What to try tonight

Keep the room cool and dark, stop alcohol at least three hours before bed, and turn the clock away from you. If you are awake more than about twenty minutes, get up, sit somewhere dim and dull, and return to bed only when you feel sleepy again. Staying in bed awake teaches your brain that bed is a place for being awake.

When to get help

If this happens most nights for more than a month, or if you snore, gasp, or wake unrefreshed, it is worth a proper evaluation. Chronic insomnia and sleep apnea both respond very well to treatment — and both are diagnosable without ever setting foot in a clinic.