Managing brain fog and forgetfulness after a car crash
A one week plan to set up reminders, written steps and simple daily routines
You walk into the kitchen and cannot remember why. The pharmacy texts that your refill is ready, and four days later it is still on the shelf. A friend asks what the doctor said, and the details have already slipped away.
Slips like these are common in the weeks and months after a concussion. They can shake your confidence. They also pile up just as a crash adds visits, forms and calls to a busy life.
This guide walks you through a one week plan for reminders, written instructions and simple routines, built on what rehabilitation research has tested. Our memory series covers choosing tools in more depth.
What brain fog means after a concussion
Brain fog is an everyday term for thinking that feels slow, cloudy or unreliable. The CDC lists feeling foggy or groggy among the thinking symptoms of concussion, along with feeling slowed down, trouble focusing and memory problems [1].
Concussion guidelines break this into a few thinking skills. Canada’s Living Concussion Guidelines cover adults with lingering symptoms, and they sort it into attention, processing speed, learning and memory, and executive function [2]. Processing speed is how fast you take in and use information. Executive function covers planning, organizing and keeping track of steps.
How common it is
The Living Concussion Guidelines expect most patients to recover fully, thinking skills included [2]. Even so, they estimate that 15% to 33% of people have thinking symptoms that last beyond the early phase of recovery [2].
Why it comes and goes
Other problems can feed the fog. The same guideline names poor sleep, fatigue, pain and mood problems among conditions that can make thinking symptoms worse or longer lasting [2]. In the guideline’s fatigue section, 27.8% of people still had fatigue 3 months after the injury, and it can drain mental energy as well as physical energy [6].
That helps explain why your memory may seem fine on Tuesday morning and poor on Thursday night. Treating sleep, pain or mood can help clear the fog. Our article on when brain fog needs a broader medical evaluation covers other causes.
The CDC points out that people with a concussion sometimes fail to notice their own problems, so a partner or friend may spot patterns first [1].
Comparison compiled by Safety Behind the Wheel Foundation
What brain fog can look like day to day
| Thinking skill | What you might notice | A tool that can help |
|---|---|---|
| Attention | Losing your place when the phone rings | One task at a time, fewer distractions |
| Processing speed | Needing people to repeat or slow down | Asking for the plan in writing |
| Memory | Forgetting a refill or what was said at a visit | Clear reminders and a written plan |
| Planning | Skipping a step in a familiar job | A step card where the job happens |
Thinking skills from the Living Concussion Guidelines [2]; tools adapted from the MSKTC cognitive problems factsheet [7].
Why outside supports work
When memory is unreliable, you can let the world around you hold some of the load. These are called compensatory strategies. They include outside tools, such as calendars and alarms, and changes to your surroundings [2].
What the guidelines say
The Living Concussion Guidelines recommend that adults with lasting thinking symptoms use compensatory strategies they can direct themselves [2]. They rate the evidence for this at their top level, A. Their examples include reminders and supports built into your surroundings [2].
A large systematic review of cognitive rehabilitation covered research from 2009 through 2014. For people with mild memory problems after a brain injury, it recommends outside memory aids such as notebooks and electronic devices [8]. It also reported that an electronic organizer may lead to fewer everyday memory failures than paper aids alone [8].
Evidence from people with lasting concussion symptoms
One trial in that review fits this topic closely. It tested a program called CogSMART in veterans who still had postconcussive symptoms 4 to 5 years after mostly mild brain injuries [8]. For 3 months, one group had an hour a week of training in strategies for memory, attention, learning and problem solving [8].
Compared with a control group, they had fewer postconcussive symptoms and better prospective memory, the skill of remembering a task at the right moment. The gains held at 12 months [8]. Most of the improvement was in emotional symptoms, though, and getting a job was no more likely [8]. Also, 74% of the veterans had PTSD, so they may differ from many crash survivors [8].
Planning and checking skills
For trouble with planning and organizing, the INCOG 2.0 guideline recommends metacognitive strategy instruction [9]. This training teaches you to stop, plan and check your own work, and goal management training is one example. INCOG also recommends self monitoring with feedback [9]. Its evidence comes mostly from moderate to severe brain injury, so the fit for concussion is less certain [9]. Both INCOG and the review favor training aimed at real problems from daily life [8, 9].
Your one week setup plan
Trying to fix everything at once can wear you out. The Living Concussion Guidelines advise pacing thinking work and spreading tasks and breaks across the day [6]. So this plan gives you one small job a day, done when your head is clearest.
If a step makes your symptoms worse, stop and rest, as the CDC advises [10]. Pick it up the next day. A trusted helper can sit with you, but keep the pen in your own hand. The MSKTC suggests that family members solve problems with you instead of for you [7].
Comparison compiled by Safety Behind the Wheel Foundation
Your one week setup plan
| Day | Setup job | You are done when |
|---|---|---|
| 1 | Write a master list of weekly duties | Every duty is on one page |
| 2 | Choose one home for dates | All appointments live in one calendar |
| 3 | Set reminders for your top five duties | Each has a clear cue |
| 4 | Write two step cards | Cards sit where the job happens |
| 5 | Draft a morning and evening routine | Two short checklists are posted |
| 6 | Pick a drop spot and a way to mark tasks done | Keys, wallet and phone have one home |
| 7 | Review and trim | You keep what worked and drop the rest |
Built from pacing advice in the Living Concussion Guidelines [6] and strategies in the MSKTC factsheet [7]. Adjust the pace with your care team.
Days 1 and 2: the list and the calendar
On day 1, write down everything you handle in a normal week. Include bills, medicines, pet care, school pickups, trash day and calls about the crash. Then star the five duties that cause the most trouble when they slip. Those get reminders first.
On day 2, pick a single calendar, paper or digital, and move every appointment into it. The MSKTC factsheet suggests using a calendar for appointments and tasks [7]. Cross out or toss other lists, so no date lives in two places.
Days 3 to 7: reminders, cards, routines and a review
Days 3 to 5 use the tips in the sections below. On day 6, pick one drop spot for keys, wallet, phone and glasses, and a simple way to show what is done. The review of cognitive rehabilitation lists checking items off a calendar as one outside memory method [8]. On day 7, rewrite or delete any reminder you kept swiping away, and cut steps that felt like too much.
Imagine a 52 year old bakery manager whose car was hit at a four way stop. Six weeks later she keeps missing calls from her therapy office. Her day 1 list has 23 items, and she stars the refill, the therapy calls, her son’s Tuesday pickup, trash night and insurance callbacks. By day 7 she has one calendar, five reminders and two step cards taped inside a cupboard door.
Reminders that work on foggy days
Write each reminder as an instruction
Alerts that say only one word are easy to swipe away. Put the action, the place and the next step in the reminder itself. A review of how patients remember health advice found that people treat specific advice as more important than general advice [3].
Comparison compiled by Safety Behind the Wheel Foundation
Turning vague reminders into clear ones
| Vague reminder | Clear reminder |
|---|---|
| Pharmacy | Pick up refill at Elm Street pharmacy before 6 p.m. |
| Call insurance | Call adjuster about rental car; claim number in this note |
| Therapy | Leave for therapy at 1:15; bring water and exercise sheet |
| Laundry | Move wet clothes to the dryer now |
Examples are made up. Clear wording follows the advice on specific instructions in Kessels 2003 [3].
Tie reminders to a clock or a habit
Some duties have a fixed time. Others fit better right after something you already do, such as pouring your morning coffee. A randomized trial tested this in 192 adults in Berlin, Germany. Tying a new daily habit to an existing routine worked about as well as tying it to a set time [11]. Pick the cue that fits your day.
Keep the number small
Too many alerts turn into noise. Start with your five starred duties, and add a new reminder only after those are working. For appointments, a heads up the evening before lets you plan the ride.
Snooze with a time, never just dismiss
When an alert goes off and you cannot act, move it to a specific later time. Dismissing it often means the task is gone. Set up or change reminders before you start the car, never while driving.
Written instructions you can follow later
Spoken information fades fast. A 2003 review of research on patients’ memory reported that people forget 40% to 80% of medical information right away [3]. Almost half of what they do remember is wrong [3]. In one study it describes, people given spoken instructions alone recalled only 14% correctly, and written information was remembered better [3].
Those studies were in general patient groups. If your thinking is slower after a concussion, writing things down makes even more sense.
At medical visits
Ask for the plan in writing before you leave. The review found that spoken information paired with written or visual information works best, and that plain words are easier to recall than complex ones [3].
You can also use teach back, a method in which you explain the plan in your own words and the clinician fills any gaps [4]. AHRQ, the federal agency for health care quality, stresses that it is not a memory test [4]. It also warns that people tend to answer “yes” to a yes or no question whether they understood or not [4].
Step cards for everyday jobs
The MSKTC suggests writing down step by step instructions to use while you learn something new [7]. A step card keeps those steps where the job happens.
What a good step card includes:
Checklist from Safety Behind the Wheel Foundation
- One job per card, with its name at the top.
- Numbered steps that each start with an action word.
- No more than about eight steps; split longer jobs in two.
- A last line that says what finished looks like.
- A home where the job happens, such as inside a cupboard door.
- One test run with a helper watching, then a fix for any confusing step.
A sample card for ordering a refill by phone:
- Get the pill bottle and your pharmacy card.
- Call the number printed on the bottle label.
- Read the prescription number slowly.
- Write the pickup day on your calendar.
- Put the empty bottle by your keys.
Finished looks like this: the pickup day is on your calendar.
Simple routines that carry the load
A routine turns a string of tasks into a habit you do not have to remember. The MSKTC factsheet suggests building your day around routine tasks [7].
How long a habit takes
Habits form slowly. In a well known study, 96 students set out to repeat one daily action, such as eating fruit with lunch, and 82 finished [12]. The typical time for the action to feel automatic was 66 days [11]. Individual estimates ran from 18 days to a projected 254 days [12]. Missing a single day made little difference [12].
Those were students without brain injuries, so your timeline may differ. Lean on your checklists while habits form.
Two short routines
Keep each routine short and post it where you will see it.
Morning routine:
Checklist from Safety Behind the Wheel Foundation
- Take morning medicines exactly as prescribed, then mark them off.
- Open today’s calendar page and read the first two items aloud.
- Set anything you need to carry beside your keys.
- Choose one main task for the day.
Evening routine:
Checklist from Safety Behind the Wheel Foundation
- Mark off what got done today.
- Move anything unfinished to a named day.
- Look at tomorrow’s first appointment and how you will get there.
- Plug in your phone at the drop spot.
- Head to bed at your usual time.
The Living Concussion Guidelines include regular sleep and wake times among sleep strategies after concussion [6].
Pause before a multistep job
Before a job with several steps, say the goal out loud, read your step card, and check your work at the end. This borrows from the metacognitive training that guidelines recommend, which a therapist can teach in full [8, 9].
A weekly reset
Once a week, spend about 15 minutes updating the master list, deleting old reminders and adding new appointments.
When to ask for an assessment or therapy
Some people need more support than a home setup, and asking for it is part of recovery.
The Living Concussion Guidelines say a referral for a specialized thinking assessment, such as neuropsychological testing, may be considered when thinking symptoms last beyond 4 weeks [2]. They add that other conditions affecting thinking should be managed first. If symptoms stay complex, they advise a referral to a specialized program [2].
The 2021 VA/DoD guideline was written for military and veteran care. When memory, attention or planning problems remain after other causes are treated, it suggests a brief round of cognitive rehabilitation with a clinician [5]. It describes trials of about 4 to 6 sessions focused on education and strategies for daily life [5]. It suggests against computer training programs that people use on their own [5]. It also suggests waiting until after the first 30 days for full thinking tests [5]. These are “suggest” statements, which are weaker than firm recommendations.
Signs it is time to call your care team
- Fog that is getting worse or will not go away [10]
- New thinking problems that start more than 30 days after the crash, which may need a check for other causes [5]
- Slips that put you at risk, such as leaving the stove on or missing doses
- Trouble keeping up at work, or worry about driving safely
If brain fog affects your attention, talk with your care team before you drive. Our guide to driving again after a concussion has a list of questions for that talk.
Get emergency care right away
The CDC lists danger signs that mean an adult needs emergency care now [1]. Dial 911 or head straight to the nearest emergency room for:
- Head pain that builds and refuses to let up
- Weakness, numbness, clumsiness, a seizure or convulsions
- Throwing up over and over
- Slurred words or behavior that seems out of character
- Pupils (the dark centers of the eyes) of two different sizes
- Confusion, restlessness or agitation, or failing to know familiar people or places
- Fainting, extreme sleepiness, or a person who cannot be roused
Questions to ask your care team
Question checklist from Safety Behind the Wheel Foundation
- Are poor sleep, pain, low mood or any of my medicines making the fog worse?
- My thinking problems have lasted more than 4 weeks. Should I have a cognitive assessment?
- Is a brief round of cognitive rehabilitation worth trying, and who provides it locally?
- Can someone help me set up and practice my reminders and step cards?
- Which duties should I hand to someone else for now?
- Is it safe for me to drive, cook or watch young children alone right now?
- Which changes in my thinking mean I should phone you sooner than my next appointment?
- Can you give me today’s plan in writing or post it to my portal?
Frequently asked questions
Can a family member set this up for me?
They can help, ideally alongside you. The MSKTC suggests that family members give extra time to think things through and sit in on therapy sessions to learn what is being practiced [7].
Will my brain fog go away?
For most adults, yes. The Living Concussion Guidelines say the majority of patients regain their usual thinking [2]. Some people have symptoms for longer, and help is available at any stage.
Should I try brain training apps?
For thinking symptoms after mild TBI, the VA/DoD guideline suggests skipping solo computer training programs [5]. Ask your care team about therapy led by a clinician.
The bottom line
Recommendation from Safety Behind the Wheel Foundation
Outside supports are a well studied way to work around brain fog while you heal. In one week you can build a master list, one calendar, five clear reminders, two step cards and two short routines.
Pace yourself. If thinking problems last beyond about 4 weeks or get worse, ask your care team about an assessment or therapy. Get emergency care for any danger sign.
Sources and further reading
- 1Centers for Disease Control and Prevention. Symptoms of mild TBI and concussion. Updated September 15, 2025. cdc.gov/…/signs-symptoms/index.html
- 2Living Concussion Guidelines. Guideline for concussion and prolonged symptoms for adults 18 years of age or older: Cognitive difficulties. Updated May 2023. concussionsontario.org/…/cognitive-difficulties
- 3Kessels RPC. Patients’ memory for medical information. Journal of the Royal Society of Medicine. 2003;96(5):219-222. pmc.ncbi.nlm.nih.gov/articles/PMC539473
- 4Agency for Healthcare Research and Quality. Use the teach-back method: tool 5. Health Literacy Universal Precautions Toolkit. Reviewed April 2024. ahrq.gov/…/tool5.html
- 5Department of Veterans Affairs, Department of Defense. VA/DoD clinical practice guideline for the management and rehabilitation of post-acute mild traumatic brain injury, version 3.0: provider summary. June 2021. healthquality.va.gov/…/VADoDmTBICPGProviderSummaryFinal508.pdf
- 6Living Concussion Guidelines. Guideline for concussion and prolonged symptoms for adults 18 years of age or older: Fatigue. Updated May 2023. concussionsontario.org/…/fatigue
- 7Neumann D, Lequerica A. Cognitive problems after traumatic brain injury. Model Systems Knowledge Translation Center. 2020. msktc.org/…/cognitive-problems-after-traumatic-brain-injury
- 8Cicerone KD, Goldin Y, et al. Evidence-based cognitive rehabilitation: systematic review of the literature from 2009 through 2014. Archives of Physical Medicine and Rehabilitation. 2019;100(8):1515-1533. doi.org/10.1016/j.apmr.2019.02.011
- 9Jeffay E, Ponsford J, Harnett A, et al. INCOG 2.0 guidelines for cognitive rehabilitation following traumatic brain injury, part III: executive functions. Journal of Head Trauma Rehabilitation. 2023;38(1):52-64. doi.org/10.1097/HTR.0000000000000834
- 10Centers for Disease Control and Prevention. Recovering from a mild traumatic brain injury or concussion (patient fact sheet). Undated. stacks.cdc.gov/…/cdc_158934_DS1.pdf
- 11Keller J, Kwasnicka D, Klaiber P, Sichert L, Lally P, Fleig L. Habit formation following routine-based versus time-based cue planning: a randomized controlled trial. British Journal of Health Psychology. 2021. doi.org/10.1111/bjhp.12504
- 12Lally P, van Jaarsveld C, Potts H, Wardle J. How are habits formed: modelling habit formation in the real world. European Journal of Social Psychology. 2010;40(6):998-1009. doi.org/10.1002/ejsp.674 (summary: British Psychological Society Research Digest, How to form a habit, bps.org.uk/research-digest/how-form-habit)
This article reflects the safety priorities of concussion recovery and road safety education. It is general education, not medical advice. Check official sources such as the CDC, and talk with your own care team about your symptoms, the tools you use and whether it is safe to drive. Reviewed October 2026.
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