I can fall asleep, but I can't stay asleep

26. May 2026

Are you tired in the evening, fall asleep quickly – and then suddenly find yourself wide awake at 2 or 3 in the morning? You’re not alone. Many people have no trouble falling asleep, but struggle to stay asleep.

There can be various reasons for waking up during the night. Often, several factors come into play at the same time.

What does ‘difficulty staying asleep’ mean?

We talk about sleep disruption when you wake up repeatedly during the night and find it difficult to get back to sleep. Waking up briefly is perfectly normal – our sleep follows cycles.

It becomes a problem when:

  • you wake up frequently
  • you lie awake for longer periods
  • you don’t feel rested in the morning
  • you experience tiredness or irritability during the day

Why do we wake up at night?

Waking up during the night is usually no coincidence. The body is reacting to internal or external stimuli.

Difficulty sleeping through the night, stress and racing thoughts

1. Stress and ruminating

A common trigger is stress. Even if you fall asleep easily in the evening, your nervous system can become active during the night. The stress hormone cortisol naturally rises in the early hours of the morning. If you’re feeling stressed, this rise can cause you to wake up – and your mind immediately starts racing.

2. Physical factors

Physical processes can also disrupt sleep:

  • slight fluctuations in temperature
  • night-time sweating
  • digestive activity
  • fluctuations in blood sugar levels

The body is more sensitive to changes at night than during the day.

3. Sleeping environment

Light sources, noises or a room that is too warm can also cause you to wake up from a lighter stage of sleep.

4. Life stage and hormonal changes

Hormonal changes – for example, during certain stages of life, such as the menopause – can affect sleep patterns. Here, too, the nervous system reacts more sensitively to internal stimuli.

Why it’s often difficult to get back to sleep

For many people, the real problem isn’t waking up itself, but lying awake afterwards. As soon as thoughts start to intrude or a sense of restlessness sets in, the nervous system becomes further stimulated.


The greater the pressure becomes (‘I have to sleep now!’), the harder it is to let go.

Pressure when falling asleep

Conclusion

Sleep occurs in cycles – and periods of wakefulness are a natural part of the biological process. If you have no trouble falling asleep but do struggle to stay asleep, this is often due to increased night-time activity in the nervous system.

 

The better you understand the possible triggers, the more effectively you can address them – and get your sleep back on track.

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