Brain fog is real. Here's what's happening (and what helps)

Walking into a room and forgetting why. Losing the word that's right on the tip of your tongue. Forgetting what you were saying mid-sentence. If this is happening to you, you're not losing your mind — you're in perimenopause or menopause, and brain fog is one of its most common, least-talked-about symptoms.

It's frightening when it first starts. It's also real, it's physical, and for the vast majority of women, it passes.

What's actually happening

Oestrogen plays a role in how your brain uses glucose for energy. As it fluctuates and falls, your brain's energy supply gets less predictable — and that shows up as fog. Add poor sleep (which also drains cognitive sharpness) and the effect compounds.

It's not early dementia. It's a temporary, hormone-driven change in how your brain is running.

What helps

• Protect your sleep — fog and sleep deprivation feed each other.
• Write things down. External memory is a tool, not a failure.
• Be patient with yourself. Frustration makes the fog thicker.
• Keep your brain gently active — reading, puzzles, conversation — without pressuring it.

Your brain isn't broken. It's running on a different fuel for a while, and it will find its way back.