Concussion in adults and the symptoms that linger
The dark room for a week is outdated advice. What actually helps, what the red flags are, and how to stage your way back to work without relapsing twice.

The old advice was a dark room, no screens, and wait it out. That's been walked back. Current concussion guidance leans toward a day or two of relative rest, then gentle, boring movement that doesn't spike your symptoms. Lying still in the dark for a week tends to make adults feel worse, not better, and it makes the return harder when you finally stand up.
So if you cracked your head on the trailer hatch Saturday morning and you're reading this on the couch with the blinds shut, open them a crack and go for a slow walk down the block. That's the useful thing, and it's first for a reason.
Everything below is general education, not a diagnosis. A concussion is a brain injury. Get seen.
Go to the ER now if any of this shows up
These aren't "call Monday" symptoms. They're go-now symptoms, and they can appear hours after the hit:
- A headache that keeps getting worse instead of leveling off
- Repeated vomiting
- One pupil bigger than the other
- Slurred speech, confusion that's deepening, or you can't wake the person up normally
- Seizure
- Weakness, numbness or clumsiness on one side
- Clear fluid from the nose or ear
- Any neck pain with the head injury, or any loss of consciousness
Blood thinners raise the stakes considerably. If you're on an anticoagulant and you hit your head, that's an emergency department visit even if you feel fine. Same if you're over 65 and the mechanism was a fall onto a hard surface.
The symptoms that hang around and surprise people
Most adults are substantially better in a couple of weeks. The part nobody warns you about is which symptoms tend to be last out the door.
Headache is the obvious one, and it often changes character. It starts as a dull global ache and turns into something that only shows up when you concentrate, or at 2 p.m. under office lighting.
Fog. You'll read the same email three times. You'll walk into the garage and forget why. Word-finding goes slightly sticky. This is the symptom that scares people most and it's usually the one that resolves without drama.
Light and noise. Fluorescent tubes, grocery store aisles, three kids and a dog in the same room. Sensory load is the trigger, not volume alone.
Dizziness and visual strain. Turning your head fast in a parking lot. Scrolling. Watching the kids' soccer game with the ball moving across your field of vision. This one gets missed constantly.
Mood and fuse length. Irritability is a concussion symptom. Your wife notices before you do. So do your kids.
Sleep. Either too much for a week, or wired at 2 a.m., or both in sequence.
Check the neck
Whatever whipped your head also whipped your neck. A lot of what gets filed as "lingering concussion" is a cervical spine problem riding along with it: headache at the base of the skull, dizziness that's worse when you hold your head in one position at a desk, and stiffness that shows up on day three.
Ask about it specifically. A physical therapist who works with head injuries will test the neck and the balance system separately, because they produce overlapping symptoms and completely different treatment plans. If you've been told "just rest" for three weeks and nobody's put hands on your neck, that's a gap worth naming out loud at your next appointment.
The graded return is the whole game
The principle is simple: do the amount of activity that gives you a mild, brief bump in symptoms, and no more. Mild bump, settles within an hour, you're in the right zone. Wiped out for the rest of the day, you overshot.
Walking first. Then a stationary bike at a pace where you could hold a conversation. Then light resistance work with no head movement and no breath-holding. Ball sports, sparring, ladders and anything where you could take another knock come last, and only after a clinician clears you.
The reason nobody cheats on this step is the second hit. A brain that's still recovering doesn't handle another impact the way a healthy one does. That's the one non-negotiable in this whole piece.
Staging your way back to work
Two full days off then straight back to a ten-hour day is how people end up taking three weeks off instead of five days. Stage it.
Day one back: a half day. Morning, when your tank is fullest. One task. No meetings.
Screens: bump the font size, turn the brightness down, and use a timer. Twenty or thirty minutes of focused screen work, then five minutes looking at something far away. This sounds fussy. It's the difference between finishing the day and leaving at eleven.
Light: ask to move away from the overhead fluorescents, or kill them and use a desk lamp. A ball cap indoors isn't a fashion statement for a couple of weeks.
Meetings: the last thing to come back, especially rooms with crosstalk. One-on-ones are fine. A twelve-person conference call with everybody unmuted is a symptom generator.
Driving: reaction time and visual tracking are both affected. If you're dizzy, foggy, or taking anything sedating, you don't drive. Ask your doctor directly when you're clear, and get the answer in plain words.
If you do physical work, the calculus changes. Heat, heights, ladders, vibration and machinery all belong on the "later" list, and your employer needs a written restriction, not a verbal one. Say it to occupational health in specifics: no work at height, no operating powered equipment, half shifts for a week.
Home isn't the easy part
Adults with jobs and kids get discharged into a house with a toddler, a school run and a dinner that doesn't cook itself. That environment is harder on a recovering brain than the office.
Trade explicitly for a week. Your spouse takes bedtime, you take the quiet, low-sensory jobs: folding laundry, prepping dinner, reading with one kid in a quiet room. Bath time with two kids and a bathroom that echoes is a bad first assignment. Say so instead of white-knuckling it.
Cut alcohol completely while you're recovering. It worsens sleep quality, it sharpens headaches, and it raises fall risk when your balance is already off. Keep caffeine steady rather than doubling it to punch through the fog, because the crash costs more than the boost gave you.
When it's been a month
Persistent symptoms past four weeks or so are common enough to have a name and a playbook, and the playbook is active, not passive. Ask for an assessment of your vision and balance systems, your neck, and your sleep. Ask whether a supervised graded exercise program makes sense for you. Ask whether any of your current medications, including the ones you're taking for the headaches, could be feeding a rebound cycle.
The thing to push back on is being told to keep resting. Weeks four through twelve are where people get parked, and parking is what prolongs it.
Write your symptoms down daily. Three lines: what you did, what it cost you, how long the bump lasted. You'll see the pattern in about five days, and it'll be more useful to your doctor than anything you can remember in an eight-minute appointment.
And get a helmet that fits the sport, the bike and your head. Most of the concussions I've watched people limp through came from something completely ordinary. A ladder. A hatchback. Ice on the third step.
Cal Brennan
Fitness
Strength coach. Trains fathers, tradesmen and desk workers, which means programs that survive a bad week.
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