Fibro Fog Explained: What It Is and How to Cope When Your Brain Won’t Work
There’s a kind of tiredness that lives in your muscles when you have fibromyalgia. But then there’s another kind — the one that lives in your head. It creeps in slowly, clouds everything, and leaves you staring at a sentence halfway through, wondering what the next word should be. Or worse, what the last one even was.
They call it fibro fog. A neat little name for something that feels anything but.
For me, the fog isn’t just about forgetfulness — it’s about disconnection. From words, from thoughts, from the version of myself I know is in there somewhere. It’s the moment when I’m telling my daughter I need a haircut, and I forget the name Tarzan — so instead, I mutter something about looking like “gorilla man” and hope she doesn’t notice the blank stare that comes next.
It’s the moments I start to speak and realise the sentence has disappeared before I’ve reached the middle. Or the times I slur my words, not because I’ve had a drink, but because my brain has simply forgotten how to form them. It’s in my writing too — I’ll be in full flow and then… stop. The words vanish. And there I sit, watching the blinking cursor, willing my brain to catch up.
And when you’re peri-menopausal on top of it all, it feels like your brain has packed up and gone on a long holiday — without telling you where it’s gone or when it might return.
What Causes Fibro Fog?
Fibro fog is one of the most misunderstood symptoms of fibromyalgia. Doctors talk about the pain, the fatigue, the sleep issues — but the cognitive side of it often gets pushed aside. And yet, it’s the thing that steals your independence in the quietest, most unsettling ways.
The science isn’t crystal clear, but it’s believed that chronic pain, poor sleep quality, hormonal fluctuations, and even sensory overload can all contribute to the fog. When your body is constantly in fight mode, it makes sense that your brain starts to fumble. It’s too busy sounding the alarm to focus on finding the word mug or remembering why you walked into the kitchen.
And it’s not just anecdotal. Studies show that up to 75% of people with fibromyalgia experience some level of cognitive dysfunction. Processing speed, memory, attention — all affected. And when that fog rolls in, it can feel like you’re not quite part of the world around you.
Could It Be ADHD Too?
Here’s where things get interesting. Over the past couple of years, more research has started to look at the connection between fibromyalgia and ADHD — especially the inattentive type. And the overlap is hard to ignore.
Some studies suggest that as many as 1 in 4 people with fibromyalgia also meet the criteria for ADHD. That’s significantly higher than the general population. And when you dig into the symptoms of inattentive ADHD — forgetfulness, distraction, poor working memory, difficulty following through — they sound an awful lot like fibro fog.
It’s something I’ve been exploring more recently. Because while my fog worsens when my pain or fatigue is bad, it also exists on its own. There are days when I’m not too sore, not too exhausted, but my brain still won’t hold onto a thought for more than a few seconds. I rely on two extra monitors just to function while I write — one for what I’m working on, and the others to keep the information I can’t hold in my head. It’s not ideal, but it gets me through.
And that’s where an ADHD diagnosis could help. Not because it magically fixes anything, but because it gives you a framework. A way of understanding your brain that isn’t rooted in guilt or self-blame.
Why an ADHD Diagnosis Might Help with the Fog
Getting assessed for ADHD when you already have fibromyalgia might not seem obvious, but it can be life-changing. It doesn’t erase the fibro, of course — but it can give you another layer of support and explanation.
If ADHD is part of the picture, it can open up options. Medication might help with focus or working memory. Structured coping strategies — like visual timers, task breakdowns, and environmental cues — can start to make a real difference. And perhaps more than anything, it can give you the language to explain why your brain doesn’t work the way others expect it to.
You stop thinking you’re lazy. You stop thinking you’re failing. You stop feeling so alone in the mental fog.
Living with the Fog
There’s no magic fix. I wish there were. I’d bottle it up and give it to every person who’s ever felt their mind grind to a halt mid-thought.
But I’ve learned that small changes can help. Giving myself permission to rest. Using tools like post-its, alarms, checklists, and extra screens. Letting people know when I’m struggling with words. And above all, being kinder to myself when the fog takes over.
It doesn’t make the fog disappear — but it makes it a little less scary.
Final Thoughts
Fibro fog is more than an inconvenience. It can shake your confidence, disrupt your work, and make you feel like you’re fading into the background of your own life. But if there’s one thing I’ve learned, it’s this: you are still in there. Even when the words are gone. Even when your thoughts tangle. Even when you forget Tarzan.
And maybe, just maybe, there’s a reason it feels like more than fibromyalgia alone. If ADHD is part of your story too, don’t be afraid to ask questions, seek help, and explore what else might be going on.
You deserve to understand your brain — fog and all.
