What is post-concussion dizziness?
New or severe dizziness can have urgent causes and should be medically assessed first (see When to get urgent care, below). Dizziness that lingers after that is what this article is about.
The inner ear and the brain's balance system are very sensitive to trauma, and a concussion can disrupt them in more ways than most people are told. Sometimes the inner ear itself is injured. Often the brain is still reorganizing after the injury, and the signals from the inner ear, eyes and neck aren't being put together correctly yet. Dislodged ear crystals are possible but not common after an impact, so they're only one piece of a much bigger picture. Finding which profile you have is what points to the right care.
When words don't do it justice
People with post-concussion dizziness often feel overwhelmed trying to describe it, and the words they find seem to downplay how disruptive it is. Some feel themselves spinning. Others feel the world spinning around them. It can be bouncy or oscillating, a side-to-side sway, or a rotational pull. Many have read about crystals, ringing, ear fullness and different kinds of vertigo, and they worry they've physically damaged their inner ear.
You don't have to find the exact words. Detailed testing of the eyes and balance system can show what's happening, even when you can't put it into language.
Is it anxiety?
Dizziness and anxiety very often show up together, and it can be hard to separate them. But being dizzy is anxiety-provoking. It isn't caused by anxiety. When your sense of where you are in space is unreliable, it's natural to feel on edge, and that doesn't make the dizziness any less real.
What's going on underneath
There isn't one kind of post-concussion dizziness. Several different profiles can involve the inner ear and the brain's balance system, and many people have more than one:
- Structural injury to the inner ear. Sometimes the impact causes real damage to the inner ear itself.
- Rewiring after the injury. After a concussion, the brain goes through an inflammatory cascade and then has to reorganize and reintegrate how it processes balance and movement. That process can feel very disruptive while it's underway, even when nothing is structurally broken.
- Sensitivity to other insults. The inner ear is highly sensitive to viruses and other pathogens, and to medications. These can add to what the concussion started.
- Central versus peripheral problems. Dizziness can come from the inner ear and its nerve (peripheral) or from how the brain processes those signals (central). The two are often not distinguished, yet they call for different care.
For many people, it's freeing to learn that "crystals" aren't the only explanation, and that there are other, measurable reasons the inner ear and balance system can be affected.
About the crystals
"Crystals in the ear" (BPPV) has become the default explanation for dizziness, but it's an oversimplification. A dislodged crystal after an impact is possible, but it isn't common.
That doesn't mean repositioning maneuvers like the Epley are only for loose crystals. These maneuvers stimulate the balance canals and the otolith organs and drive signaling through the inner ear's hair cells. They can be useful and impactful even when no crystal is out of place. The problem comes when every dizzy patient is treated as a crystal problem: if all you have is a hammer, everything looks like a nail.
Your eyes are part of it
There are almost always visual consequences too: visual fatigue and reduced visual endurance, trouble with screens, bright light and busy places. Many people don't see that their eyes and their dizziness are connected, and hearing it often brings relief. The eyes and the inner ear work together to keep you oriented, so when one is disrupted, the other is affected.
What a thorough evaluation should look at
No single test explains post-concussion dizziness. A thorough workup looks at each part of the system and how the parts line up with each other. For dizziness, that should include:
- Eye movements at rest, in the dark with no visual target, where small drifts and beating eye movements can show up that you'd never notice.
- Optokinetics: how your eyes respond to moving patterns.
- The vestibulo-ocular reflex (VOR) and VOR suppression: how well your eyes stay steady when your head moves, and how well you can override that reflex when you need to.
- Video head impulse testing (vHIT) of each balance canal.
- Every direction of movement. Your inner ear senses rotation (yaw, pitch and roll) and also movement in a straight line, such as up and down or side to side (bob, heave and sway). Many patients have never had every direction tested. Moving the whole body vertically, for example on a hydraulic table, tests the straight-line sensors that turning alone misses.
- The neck, because neck mechanics and position sense feed directly into how the brain maps head movement.
- Autonomic function and blood flow to the brain. The balance networks depend heavily on blood supply and oxygenation. An autonomic assessment looks at how your body responds when you're brought upright, measuring blood flow to the brain with transcranial Doppler alongside CO2 (EtCO2), heart rate, blood pressure, oxygen and breathing rate. Blood pressure and heart rate can look normal while blood flow to the brain still drops, which can feed lightheadedness and dizziness.
The right test comes before the right treatment.
What helps
There is no standard dizziness plan. Good care comes from the full set of test findings, often hundreds of measurements, and two people with the same symptoms can need opposite approaches. One person needs to be kept very still while the eyes are trained with visual and optokinetic drills. Another needs neck work that brings the neck's position sense back in line with the vestibular and visual systems. Another needs repositioning maneuvers, controlled rotation in a rotary chair, gait training that includes walking backwards, or eye divergence drills.
The more advanced approach is to work on these systems together, not one at a time.
- Therapy stacking. Several individually supported therapies are layered into the same moment: for example, stimulating one inner ear while holding a fixation target, adding optokinetic stripes in a set direction, active head movements to train the VOR, vibration or peripheral stimulation of the face, and bone conduction sound. Each piece is chosen from the testing. Layered together, they add up through spatial and temporal summation, giving the brain a stronger, more specific signal to reorganize around.
- The right ratio of each input. It isn't only which therapies are used but how much of each: how much stillness versus movement, how much visual versus vestibular versus neck versus autonomic work. Those proportions are set by the testing and adjusted as the findings change.
- Supportive modalities layered in to help the training take hold, such as low-level laser (photobiomodulation) to support the energy demands of neural reorganization.
- Monitoring while you train. Blood flow to the brain (transcranial Doppler), CO2, pupil responses and other autonomic measures can be watched during sessions. They show early warning signs of fatigue before you feel them, so each challenge stays constructive instead of setting you back.
In our clinic, this is how sessions for lingering dizziness are built: one plan that addresses the inner ear, eyes, neck and autonomic system at once, measured as it happens.
Will it fade slowly, or stop one day?
This is one of the most common questions people ask. Recovery isn't usually a switch that flips. Progress often shows up first during the training itself: following a stripe pattern gets easier, the same challenge causes less dizziness, and you can do it for longer. When the training targets the specific problems that testing found, those in-session gains tend to carry over closely into daily symptoms.
In daily life, it tends to fade rather than switch off. The dizziness takes up less and less of your mental bandwidth. At first you notice it whenever you think about it. Then a day or two goes by while you're working or busy, and you realize you haven't thought about your dizziness at all. When that happens, you're close.
An example: the cause she couldn't feel
A gymnast slammed her head hard into the mat. Dizziness drove most of her symptoms afterward, and it lingered for weeks to months. She couldn't drive or go into a grocery store without feeling overstimulated. Screens triggered her right away from the brightness, even with blue light filters. She had to limit her activity, couldn't work as much as she wanted, and even her cardio training was limited.
Her testing showed a beating nystagmus without looking off to the side, along with a torsional (rotational) drift of her eyes at rest, with no visual stimulus at all. She couldn't have felt or described that drift, but it was quietly feeding her dizziness. Reducing that background drift became the main goal of her care.
Today she's recovered. The eye drift and the light sensitivity are gone, and she's back to reading and working. Like anyone who's had a concussion, she's careful to avoid another head injury.
When to get urgent care
Sudden dizziness with facial weakness, arm weakness or numbness, slurred speech, sudden confusion or a sudden severe headache needs the emergency room. These can be signs of a stroke.
After a significant head injury, initial imaging can be warranted before rehabilitation begins.
Frequently asked questions
Did I permanently damage my inner ear?
Sometimes a concussion causes real structural damage to the inner ear. Often, though, the dizziness comes from the brain reorganizing and reintegrating balance signals after the injury's inflammatory cascade. Viruses and medications can also affect the inner ear. Testing shows which profile you have.
Is it just crystals in my ear?
Dislodged crystals after an impact are possible but not common. Repositioning maneuvers like the Epley can still help without a loose crystal, because they stimulate the balance canals, otoliths and hair-cell signaling.
Is my dizziness caused by anxiety?
Dizziness and anxiety often show up together, but being dizzy is anxiety-provoking. It isn't caused by anxiety.
Why are my eyes so tired?
There are almost always visual consequences with post-concussion dizziness, such as visual fatigue and reduced visual endurance. The eyes and inner ear work together, so when one is disrupted, the other is affected.
How will I know I'm getting better?
Progress usually shows up in training first. In daily life, dizziness takes up less and less of your mental bandwidth, until a day or two passes without you thinking about it. That's when you're close.
Ready to find out what's driving your dizziness?
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