Persistent symptoms after a concussion usually point to a few specific systems that haven’t fully recovered — not permanent brain damage — and those systems respond to targeted rehab.
Direct answer: Post-concussion syndrome (PCS) is when concussion symptoms carry on past about three to four weeks. It rarely means something is permanently wrong. A proper assessment looks for which systems are still driving the symptoms — vestibular, oculomotor, cervical, or autonomic — and the rehab programme treats each one on its own terms rather than waiting for time to fix it.
Why haven’t my concussion symptoms gone away?
Most concussions settle inside two to four weeks. When they don’t, the advice a lot of people get is to rest more, wait it out, or that there’s nothing left to do. That advice is often wrong, and it’s the reason so many people land in our Vancouver clinic months later, still not fully recovered.
By the time symptoms have dragged on, the issue is often less about the brain and more about the systems around it. The acute injury may have healed. What’s left is one or two systems still not functioning properly. These systems don’t recover on a clock. They recover when you give them the specific work they need.
On assessment in patients who present weeks or months post-injury, I typically see problems in one or more of the following systems:
- The autonomic nervous system
- The cervical spine (i.e. the neck)
- The visual system
- The vestibular system
The initial conversation is all about how in the coming weeks, we will be assessing each system and coming up with a treatment plan to address each problem.
One thing worth saying plainly: a clear CT or MRI does not mean you’re imagining things. Imaging rules out bleeding and fractures. It tells you nothing about whether your vestibular pathways are firing properly, whether your neck is feeding your headaches, or whether your heart rate goes haywire the moment you exert yourself.
What are the most common symptoms of post-concussion syndrome?
No two patients look the same, but the complaints we hear tend to fall into a handful of groups.
Headache and head pressure. Usually the most disabling of the lot. It can come from the upper neck (cervicogenic), it can be migraine-type, or it can be tension-type — and each one is treated differently, which is why “take something for the headache” so rarely works.
Dizziness and balance trouble. Most often vestibular. Carsickness, struggling in busy supermarkets, feeling unsteady on uneven ground — these are the classic tells. Vestibular rehabilitation is the evidence-based route for this group.
Cognitive fog. Trouble concentrating, slower thinking, mental exhaustion after tasks that used to be nothing. Patients describe it as running out of battery halfway through the morning.
Mood and sleep. Anxiety, a short fuse, broken sleep. These tangle up with the physical symptoms and feed each other, which is part of why PCS is so wearing. Sort out the physical drivers and the sleep and mood often ease off behind them.
In my experience, the type of symptoms don’t tend to differ between different patient groups, such as athletes vs. motor vehicle accident patients vs. workplace injury, as someone can experience any of the symptoms regardless of what group they fall into. However, I do find that the course of recovery does vary quite differently between these groups – more on this later.
How is post-concussion syndrome treated?
There’s no single treatment for PCS. There’s a set of targeted ones, and the right mix comes out of what your assessment actually shows — not a template.
A thorough concussion management assessment is what pins down which systems are involved in your case. The treatment follows the findings, in that order.
Vestibular rehabilitation works the inner-ear and brainstem pathways that handle balance and gaze stability. Gaze stabilisation drills, habituation protocols and balance retraining get prescribed off the back of specific vestibular testing, not a hunch. People whose main complaint is dizziness and motion sensitivity tend to respond best here.
Cervical physiotherapy treats the upper neck, which is always going to be involved to some degree when a concussion occurs. A significant portion of post-concussion headaches are cervicogenic — coming out of the C1–C3 joints and muscles — and those respond well to manual therapy and targeted exercise rather than concussion-specific rehab alone.
Sub-symptom-threshold aerobic exercise has become a first-line, evidence-supported treatment, not a reward you earn once you feel better. The Buffalo Concussion Treadmill Test finds the heart-rate ceiling where symptoms kick in, and graded exercise is set just under it. Both the physical deconditioning and the autonomic nervous system dysfunction associated with concussion improve with this.
Oculomotor retraining deals with the eye-teaming, smooth pursuits, and saccades that often fall out of sync with a concussion. Screen fatigue, losing your place when reading, and visual dizziness are some common giveaways.
The primary assessment tools that we use at Envision for assessing PCS are the Buffalo Concussion Treadmill Test, the VOMS test, the DANA test, and for athletes returning to higher-risk contact sports, the Blackhawks test. These CCMI protocols apply to both PCS management as well as acute cases.
How long does post-concussion syndrome treatment take?
Timelines vary, and honestly that’s the honest answer. Someone who walks in two months out with mostly vestibular symptoms is on a different track than someone five months out carrying a cervicogenic, oculomotor and autonomic mix all at once.
What the research does back consistently is that starting the right treatment sooner tends to mean faster improvement. Sitting and waiting, or being handed advice to rest and nothing else, doesn’t protect the brain — it gives the dysfunctional systems more time to set in.
For example, when I’m trying to predict the course of recovery for a single mom dealing with PCS with complex symptoms after an MVA as well as the added stress of taking care of her kids, trying to return to the workplace, and various other life stressors, I know this will look very different than say, an athlete dealing with PCS with more straightforward symptoms, less other forms of life stress, and a more clear return to sport pathway to follow.
If a return to sport is part of your picture, the order you do things in matters — feeling fine at rest is not the same as being cleared for contact. Our guide on the concussion return-to-sport protocol walks through how those calls actually get made.
Can post-concussion syndrome be permanent?
For most people, no. The current evidence is that PCS is treatable rather than permanent, including for people who are well past the injury.
In my own practice at Envision, I see patients improve — often people who came in months or years after their injury and had been told they were stuck with it. Even when symptoms have persisted for months or years, with the right targeted therapies, the brain can adapt and improve.
There is a smaller group with complex or long-standing PCS whose recovery is slower and less complete. The factors that show up most often in those harder cases are previous concussions, a history of migraine, an anxiety or mood disorder, and a long delay before starting proper treatment.
None of that is a reason to write yourself off if you’re a year or more out. It is a reason not to sit and wait if you’re at two or three months and not seeing the progress you want.
When patients present to the clinic with longstanding PCS, they are often quite discouraged and frustrated, and rightfully so. But oftentimes, after they’ve finally had someone explain what is actually going on with their brain, they leave the clinic feeling much better knowing that there is reason for hope and a plan in place to get them better.
Frequently asked questions
Is post-concussion syndrome the same as a second concussion?
No. PCS is ongoing symptoms from the original injury that haven’t resolved. A second concussion is a new injury sustained before the first has fully healed — and it carries meaningfully higher risk. The two can coexist if someone re-injures before recovering, but they are distinct.
Can I exercise if I have post-concussion syndrome?
Yes — carefully. Complete rest is no longer recommended and is associated with worse outcomes. Sub-symptom-threshold aerobic exercise is an active treatment for PCS in many patients. The key is determining your individual heart-rate ceiling through assessment, then exercising at or below it. Your physiotherapist sets that threshold; doing it unguided carries risk of symptom flare.
Do I need a doctor’s referral to see a physiotherapist for PCS?
No. In BC, physiotherapists are direct-access providers. You can book directly without a GP referral. If your injury involves an ICBC or WorkSafeBC claim, contact the relevant body first to understand coverage requirements — but you do not need a referral to be assessed.
My concussion was over a year ago. Is it too late to get treatment?
It is not too late to be assessed, and plenty of late-presenting patients still benefit. Recovery can take longer the further out you are, but improvement is realistic for many people in this situation. The first step is the same as always — a proper assessment to find what is actually driving the symptoms now.
Is post-concussion syndrome a mental health condition?
No — though the distinction matters less than it might seem. PCS has identifiable physiological drivers (vestibular dysfunction, cervicogenic pathology, autonomic dysregulation), and those are what physiotherapy addresses. Mood and cognitive symptoms are real consequences of those underlying issues, not evidence that the problem is “in your head.” That said, psychological support alongside physiotherapy can be a valuable part of care, particularly for patients with significant anxiety or sleep disruption.
About the author
Harry Toor (BScPT, Sports Physio Dip, FCAMT, CGIMS) is a registered physiotherapist and co-owner of Envision Physiotherapy in Vancouver. He spent three years as the therapist for the Canadian Men’s ski team and has been part of the medical team for the 2006 and 2010 winter Olympics. Harry’s primary methods of treatment are manual therapy, IMS and exercise. He is currently an instructor for Sport Physiotherapy Canada and the Canadian Red Cross, an Adjunct Professor in the Gross Anatomy Lab at UBC for the Physiotherapy Masters Program, and an instructor for the Foundations Health Education IMS course.
Still stuck weeks or months after a concussion?
If your symptoms haven’t budged, the next move isn’t more rest — it’s finding out which systems are still misfiring. Concussion assessment is available at both Vancouver clinics — South Granville (604-737-7309) and False Creek / Olympic Village (604-876-2344). No referral needed, and treatment after a car accident is covered by ICBC. Learn more about concussion management at Envision or get in touch to book an assessment.
This article is for educational purposes only and does not replace individualised medical advice. If you are experiencing worsening neurological symptoms, attend your nearest emergency department.