Post-Concussion Symptoms and PTSD After an Accident

Two of the most costly injuries after a collision leave no mark on any scan, and both are routinely treated as if they were not injuries at all.

The injuries nobody can see

A broken wrist is believed. It is visible, it has a timeline, and nobody asks the patient whether they are exaggerating it. Persistent post-concussion symptoms and post-traumatic stress have none of those advantages. They do not appear on a CT, they have no fixed timeline, and the people carrying them are frequently told — sometimes by clinicians, often by employers, occasionally by family — that they should be over it.

That disbelief is itself part of the injury. Patients arrive here having stopped mentioning the symptoms because mentioning them has not gone well.

What persistent concussion symptoms cost, in earnings

This is where the research is most concrete, and the numbers are worth knowing because they are so far from how the injury is usually treated.

A four-year cohort study following 245 adults who were employed before a mild traumatic brain injury found that, four years later, 17.3% had left the workforce or reduced their hours for reasons other than retirement or study, and a further 15.5% were still experiencing limitations at work because of the injury. Roughly a third of people who were working before a mild brain injury were, four years on, either working less or working with difficulty.

The same study found something more useful still: the symptom that predicted lost work productivity four years later was reported at one month — patients who said they were taking longer to think. That is a symptom nobody scans for and most people do not think to mention.

A separate cohort of 434 patients with traumatic brain injury of varying severity found that even among those with mild injury, 43% reported cognitive problems and 33% reported behavioral problems in the chronic phase, and that both domains independently predicted whether someone returned to work.

The part that is not about money

Post-traumatic stress after a collision is more common than most people, including many clinicians, assume.

The largest US study of this — the AURORA study, which prospectively enrolled adults across 19 emergency departments and validated the findings at 11 more — looked specifically at people who were discharged home after a motor vehicle collision. Not the badly injured. The ones sent home. At three months, 27% had substantial post-traumatic stress symptoms, and the validation cohort found 26%.

That is roughly one in four people who walked out of an emergency department being told they were fine.

What that looks like in a life is specific and rarely discussed. Not being able to drive the road where it happened. Bracing at every set of brake lights. Snapping at a partner over nothing and not knowing why. Lying awake replaying two seconds of it. Avoiding the car entirely, then avoiding the errands that need the car, then avoiding the people at the end of those errands. It contracts a life quietly, and because none of it is a symptom people associate with a car accident, it goes unreported for months.

Why the two travel together

Concussion and post-traumatic stress after a crash are difficult to separate, and they make each other worse. Disturbed sleep, poor concentration, irritability and low mood belong to both, so a patient with either can be given the other’s label — or given neither, and told they are stressed.

The clinical reason to separate them is that the treatments differ. The reason to treat both is that neither resolves reliably while the other is untreated.

There is a third thread we look for specifically: whether the headache is coming from the brain or from the neck. Cervicogenic headache after a whiplash injury presents almost identically to post-concussion headache and is treatable in a way the brain injury is not. Patients who have been managed as post-concussion for months sometimes improve within weeks once the neck is treated.

The part that should be said clearly: most people recover

None of the above is a prediction about you, and it would be dishonest to present it as one.

A prospective study of previously healthy adults with mild traumatic brain injury found that 96% returned to work or normal activities within a year, and that by six months the group as a whole did not differ from injured controls on cognition, fatigue or mental health.

The same study found something practical about the minority who did not recover: a large proportion of them had a modifiable psychological risk factor identifiable at one month — depression, traumatic stress, or low resilience. Not a fixed characteristic. Something treatable, detectable early, in the window where treating it changes the outcome.

That is the argument for saying something at the first appointment rather than the fourth.

What we do about it here

We ask. Concussion and traumatic stress symptoms are part of the assessment after any collision, not an optional add-on, because patients reliably do not raise them unprompted.

We separate the headache sources, treating the cervical spine where it is contributing — which is often, and which is the part of this we can treat directly.

We manage return to activity as a graded progression rather than as rest. Complete rest prolongs concussion recovery; the evidence favors starting below the symptom threshold and building.

And where post-traumatic stress is present we say so plainly and refer for treatment that works. It is outside our specialty and it is not outside our responsibility to name it. Pain treatment in someone with untreated traumatic stress tends to underperform, which is a clinical reason as well as a human one.

If any of this is familiar, say so when you call — it is part of the assessment, not an aside. (314) 310-5577 or text (314) 886-5902. See also concussion and head injury and cervicogenic headache.