If you have started waking reliably between 2 and 4am with a racing mind or a hot, restless body, you are experiencing one of the most common and disruptive symptoms of perimenopause: hormonally driven insomnia.
What is happening physiologically
Progesterone has a natural calming, sleep-supporting effect — and its decline during perimenopause removes that buffer. Combined with night sweats and oestrogen’s role in regulating body temperature, the result is fragmented, lighter sleep even without an obvious trigger.
Why “just relax” does not work
This is not insomnia caused by stress alone, so stress-reduction techniques alone often fall short. Addressing the hormonal driver — through lifestyle changes, supplements, or HRT where appropriate — tends to matter more than sleep hygiene tweaks in isolation.
Strategies that help
- Keep the bedroom cool (around 18°C) to reduce night sweat severity
- Avoid alcohol within four hours of bedtime — it fragments sleep even more in perimenopause
- Maintain a consistent wake time, even after a poor night, to anchor your circadian rhythm
- Discuss magnesium glycinate or HRT with your doctor if symptoms are significant
When to escalate
If insomnia is persistent and affecting your daily life, it is worth a dedicated conversation with your GP rather than accepting it as an inevitable cost of this life stage. Effective treatments exist.