Someone Wiped The Chalkboard
I’m standing in the supermarket. I have a list. I’m looking at it.
And my mind has gone completely blank. Like someone has walked up to an internal chalkboard and wiped every word off it. I’m staring at the paper in my hand and I cannot connect what I’m reading to any coherent action. I cannot think what to do next. I cannot think at all, really.
I often wonder, in those moments, if people are looking at me. If I look as lost on the outside as I feel on the inside.
That is what diabetes mental confusion actually feels like. Not abstract. Not a general haziness. A specific, disorienting blankness — present and gone in waves, unpredictable in its timing, impossible to push through by just trying harder.
What’s Actually Happening
The brain runs on glucose. When blood sugar is significantly low, significantly high, or swinging rapidly between the two, the brain’s functioning is directly affected.
With hypoglycaemia, the cognitive effects can be dramatic and fast — the sudden inability to form a sentence, to remember a word, to complete a thought that was clear moments ago. The chalkboard gets wiped.
With sustained hyperglycaemia, the effect is different — more like a fog that settles gradually. A heaviness in the thinking. A sense of operating through something thick and resistant. Slower processing. Reduced working memory. The feeling of being somehow less present in your own mind.
And with the blood sugar swings that many T1Ds experience — the rapid fluctuations that keep the brain in a state of metabolic instability — the cognitive effect is ongoing and accumulating. You are never quite fully sharp because the conditions for being fully sharp are rarely fully present.
What It Costs
The mental confusion that T1D produces is not just inconvenient. It has real consequences — in work, in relationships, in the ordinary demands of daily life.
In a work context: the meeting where you can’t follow the thread of what’s being discussed. The task that should take twenty minutes taking twice as long because the thinking keeps sliding away. The conversation where you know you should have a response but the response won’t come.
In daily life: the supermarket moment. The mid-sentence forgetting. The standing in a room knowing you came in for something but with no access whatsoever to what that thing was.
And the secondary consequence — the self-criticism that follows. “Why can’t I think straight? What’s wrong with me?” When the answer, of course, is nothing. The blood sugar is doing what it does, and the brain is responding accordingly.
What Helps
Checking your levels when the confusion arrives — if you’re in a position to do so — is the first practical step. Knowing whether the confusion has a blood sugar cause gives you the right response: treat the low, wait for the high to come down, give the correction time to work.
Reducing the demand on yourself during the confusion. Not trying to push through a cognitive task that the brain isn’t currently equipped to complete. Sitting down. Waiting. Coming back to it.
Telling the people in relevant contexts — work colleagues, close people — that this happens sometimes. That it isn’t a personality issue or a lack of effort. That it’s physiological and temporary. The conversation, had in a calm moment, reduces the secondary shame that the confusion can otherwise produce.
And forgiving yourself for it. The mental confusion is not your fault. It is the condition behaving as conditions do — unpredictably, without regard for what you need to be doing right now.
Diabetes and Mental Confusion Unmasked
T1D and mental confusion are a duo you didn’t asked for, yet here they are—crashing into daily life like an uninvited houseguest who eats all your snacks. If you’re new to diabetes, you may already know that the brain doesn’t exactly enjoy playing tug-of-war with blood sugar.
And before we dive in, let me remind you: I am not a doctor. I’ve just lived long enough in this circus to tell you where the clowns usually hide.
The Strange Link Between Blood Sugar and the Brain
Your brain is a greedy little organ. It devours glucose like a toddler hoarding candy, and when blood sugar goes rogue, your thoughts turn into scrambled eggs. Too much sugar slows everything down. Too little, and your neurons start panicking. Either way, diabetes and mental confusion show up uninvited.
Hyperglycemia: The Molasses in Your Mind
When blood sugar climbs sky-high, thinking feels like trying to run in quicksand. Words don’t land right. Names escape you. Sentences trail off mid-thought. You’re not “lazy”; your brain is literally drowning in glucose. Diabetes and mental confusion make even basic tasks feel like advanced calculus.
The “New to Diabetes” Struggle and Brain Fog
If you’re new to diabetes, mental confusion feels like betrayal. You’re learning carb counts, injections, and suddenly—bam—your brain checks out. It’s like cramming for an exam while someone keeps erasing the chalkboard. The struggle is real, and the phrase “new to diabetes” could be a whole tragicomic Netflix series.
Short-Term Cognitive Chaos: What It Feels Like
In the moment, diabetes-induced confusion feels surreal. You can be mid-conversation and suddenly forget what words mean. It’s embarrassing, scary, and often hilarious—if you have the right sense of humor. If you’re new to diabetes, these episodes can feel like a cruel initiation ritual.
Long-Term Impact: When Confusion Leaves Scars
Frequent sugar swings do more than ruin conversations. Over time, they can affect memory, decision-making, and even increase risk for dementia. This isn’t to scare you—it’s motivation to wrestle control back. For anyone new to diabetes, this long-term reality is both daunting and fuel to fight smarter.
The Emotional Toll of Not Trusting Your Own Mind
Nothing bruises confidence like not trusting your brain. You second-guess your thoughts, your decisions, even your independence. It’s like playing poker with someone constantly switching the deck. Diabetes and mental confusion don’t just rattle your memory—they mess with your confidence too.
The Myth of “Just Eat Something”
People love to chirp, “Just eat something!” as though confusion vanishes with a snack. Spoiler: it doesn’t. Recovery from an episode takes time, and the emotional hangover often lasts longer than the sugar crash. For those new to diabetes, this myth can feel like the world’s worst advice column.
Sleep Deprivation: The Silent Accomplice
Missed sleep is brain fog’s shady accomplice. Lack of rest wrecks blood sugar control, making confusion more likely. It’s a vicious cycle: poor sleep worsens diabetes, and diabetes worsens sleep.
Stress and Anxiety: Brain Fog’s Favorite Wingmen
Stress hormones act like sugar-slinging bartenders. They pour cortisol shots into your bloodstream, spiking glucose and fueling confusion. Add anxiety, and you’ve got a perfect cocktail for chaos.
Nutrition: More Than Just Numbers
Balanced meals aren’t about impressing a dietitian. They stabilize blood sugar, which stabilizes your mind. Fiber, protein, and low-GI carbs don’t just fill you—they save your sanity.
Hydration: Your Brain’s Forgotten Best Friend
Dehydration worsens confusion. Even mild fluid loss makes concentration harder. Drink water like your brain depends on it—because it does.
Movement and Exercise: Clearing the Mental Smog
Exercise isn’t just about weight or heart health. It helps regulate sugar swings and boosts mental clarity. A walk can sometimes clear the fog faster than another coffee.
The Power of Humor in Dark Moments
Dark humor saves lives. When confusion leaves you saying ridiculous things, laughter flips the script. Instead of shame, you find connection. Besides, who doesn’t want to retell the story of “that time I called the fridge my cousin”?
Mindset Shifts That Actually Work
Shift focus from perfection to progress. Expect sugar swings. Expect fog. But also expect to rise above them with resilience and strategy. You don’t need flawless control—you need persistence.
Practical Grounding Techniques for Brain Fog Episodes
When confusion hits, grounding helps. Count objects in the room. Name colors. Breathe deeply. These little rituals anchor you until your brain catches up.
Building a Support System That Doesn’t Sugarcoat
Surround yourself with people who get it—or at least don’t belittle it. Whether friends, family, or online communities, your crew should bring empathy, not eye-rolls.
There are no prizes in dealing with this alone
When the confusion and brain fog get too much – I’m here.
Yours,
Pete 🙂
