There’s no fix for a brain that filters differently now. What there is, built slowly through years of getting it wrong before getting it right, is a set of daily practices that keep the flooding from running my life.
I wrote about what sensory flooding actually is, and why it happens after a brain injury, in Understanding Sensory Overstimulation (‘Flooding’) After Brain Injury. This post picks up where that one leaves off. It’s less about the mechanism and more about the daily, practical work of building a life a changed brain can actually handle.
Managing flooding isn’t about eliminating stimulation. It’s about respecting a budget that’s smaller than it used to be, and spending it on purpose instead of by accident.
What Changed, and What I Had to Learn to Notice
The brain I’ve been managing since my TBI isn’t the same one I had before it. Some of that difference is subtle enough that people around me rarely notice it in ordinary conversation. Word retrieval is one example. I’ll reach for a word I’ve always had immediate access to, and find a brief gap where it should be. Usually it arrives a second later. But the gap is there now in a way it wasn’t before, consistently enough that I can’t pretend I haven’t noticed it.
Fatigue works differently too. Mental effort that used to be automatic now costs something real. Following a complex conversation, reading something dense, processing new information quickly — all of it is still possible, but it draws down a reserve that depletes faster than it used to and takes longer to refill. Flooding is what happens when that reserve runs out faster than I expected it to, usually because too much came in at once without enough space between it.
Learning to notice the early signs before flooding fully arrives took me longer than I’d like to admit. For years I kept pushing through the first signals, the way I always had before the injury, and kept getting blindsided by the crash that followed. The single biggest shift in managing this well was learning to treat those early signals as real information instead of something to override.
Environmental Control
A lot of what helps isn’t dramatic. It’s the accumulation of small, deliberate adjustments to the spaces I spend the most time in.
Lighting matters more than I expected it to. Harsh overhead lighting, particularly fluorescent lighting, is a faster route to flooding for me than almost anything else. I’ve shifted as much of my home environment as I reasonably can toward softer, warmer light sources, and I’m more deliberate about avoiding spaces with harsh lighting when I have a choice.
Background noise is the other major one. A quiet room with one conversation happening is manageable. The same room with a television on, several conversations layered on top of each other, and background music is a very different environment for a brain that has to work harder to filter all of it out. I’ve gotten more comfortable asking directly for a quieter setting, or stepping into a quieter room, rather than pushing through and paying for it later.
None of this means retreating from life. It means being honest about which environments cost more than others, and making choices accordingly rather than assuming I should be able to handle whatever’s in front of me the way I used to.
Digital Habits and the Overstimulation Multiplier
Screens deserve their own mention, because they multiply the problem in a way that isn’t always obvious. A phone or a screen isn’t just one input. It’s a constant stream of visual movement, notification sounds, and rapidly shifting content, often while something else is also competing for attention in the room. For a brain that has become more sensitive to competing sensory and cognitive demands after injury, that combination adds up fast. I think of it practically as having a smaller “filtering budget” — a useful description of what the experience feels like, not a claim that researchers have identified one single filtering mechanism behind it.
I’ve had to build real boundaries around screen use, particularly in the evening and particularly when I’m already running low. Scrolling when I’m already fatigued doesn’t feel like rest. It feels restful in the moment and then produces a flooding response an hour or two later that a genuinely restful activity wouldn’t have. Recognizing that gap between what feels relaxing in the moment and what actually functions as rest for this specific brain was one of the more useful things I’ve learned.
Rest as Active Management, Not Downtime
Before the injury, rest was something I did when I had time for it. Now it’s something closer to active management, a deliberate part of how I keep the system functioning rather than an optional bonus if the day allows for it.
That’s meant building real, protected downtime into most days, not just the days that feel demanding. Waiting until I’m already flooding to rest is waiting too long. The practices that actually work are the ones built in ahead of time, on a predictable rhythm, rather than the ones I reach for only after things have already gone sideways.
Pacing is the broader principle underneath this. Spreading demanding tasks out rather than clustering them, building in recovery time between things that require real cognitive effort, and treating a full, unstructured day as something that needs planning rather than something I can just wing the way I used to. None of that was intuitive to learn. It went against a lot of how I’d always approached getting things done.
What Helps, and What Doesn’t
An honest inventory matters here, including the things that sound helpful but haven’t actually worked for me.
What helps: stepping away to a quiet, dimly lit space at the first sign of flooding, rather than waiting to see if it passes on its own. Single-tasking rather than multitasking, especially on days that are already demanding. Protecting the transition time between activities instead of moving directly from one demanding thing to the next. Being upfront with people close to me about what’s happening in the moment, rather than trying to push through and mask it.
What hasn’t helped, despite sounding reasonable: trying to power through with caffeine or sheer willpower, which usually just delays the crash and makes it worse when it arrives. Forcing myself to stay in an overstimulating environment because leaving felt socially awkward. Treating a bad flooding day as a sign I needed to try harder rather than a sign I needed to rest more deliberately.
A Realistic Daily Checklist
Not aspirational. Achievable even on a rough day:
- Check in with yourself once in the morning: how much reserve does today actually have?
- Build in at least one protected quiet stretch, even ten or fifteen minutes
- Notice the early signs of flooding rather than waiting for the crash
- Say no to one thing that isn’t essential if the day is already full
- End screen time at least thirty minutes before trying to rest
FAQ
Does this get better with time after a TBI?
For many people, sensitivity does improve somewhat over the months and years following an injury, though the timeline and degree vary a great deal person to person. For me, it’s been more about learning to manage a permanently different baseline well than waiting for a full return to how things worked before.
Is this the same thing as sensory processing disorder?
They’re related but not identical. Sensory flooding after a brain injury occurs in the context of an acquired injury, which makes it a different clinical picture from developmental sensory processing disorder even though the day-to-day experience can look similar. Researchers are still working out why sensory input becomes harder to tolerate after brain injury; proposed contributors include changes in sensory gating and habituation, attention and processing speed, working memory, fatigue, anxiety, and other interacting factors rather than one established “filtering” defect.
What if the people around me don’t understand what’s happening?
This is genuinely hard, and I don’t have a tidy answer for it. What’s helped me most is being specific rather than vague when I explain it, and accepting that some people will understand more readily than others. The people worth keeping close are usually the ones willing to learn, even if it takes them a while.
A brain that filters differently isn’t a broken brain. It’s a brain that needs a different set of daily practices to work well, and those practices can be learned.
If you’re new to managing this, start small. Pick one environmental change, or build in one protected quiet stretch each day, before trying to overhaul everything at once. The goal isn’t a perfectly controlled life. It’s a sustainably managed one.
Read My Full Story
This post touches the daily management side. The fuller account of the injury itself and what recovery actually looked like is in Still Walking.
Related Reading
Understanding Sensory Overstimulation (‘Flooding’) After Brain Injury — What flooding actually is, and why it happens.
B12 and Neurological Recovery: What Epilepsy and TBI Patients Need to Know — A nutrient worth tracking for anyone managing TBI recovery.
Resource Hub — Explore neurological support, brain injury resources, practical tools, and related guidance.
Disclaimer
Content on Real David Julian is provided for educational and informational purposes and may include research-based discussion, personal experience, and opinion. It is not medical advice and is not a substitute for individualized care from a qualified healthcare professional. Always discuss your specific health needs, diagnoses, medications, supplements, treatments, or major health decisions with an appropriate healthcare professional. See the full Disclaimer for additional information.