Post-Concussion Nausea: Causes, Treatment & What to Do
Why does a concussion make you nauseous?
Nausea is a common symptom after a concussion, particularly when it occurs along with dizziness, motion sensitivity, headaches, visual problems, or difficulty tolerating movement.
But nausea itself isn't the problem you need to treat.
The important question is: What is causing the nausea?
A concussion can disrupt several systems that work together to control balance, eye movements, blood flow, movement, and how your brain interprets information from your environment. When those systems aren't communicating normally, nausea can be one of the results.
That means post-concussion nausea can have several different causes—and the right treatment depends on identifying which systems are involved.
Why Does a Concussion Cause Nausea?
Your brain constantly receives information from your:
Inner ears and vestibular system
Eyes and visual system
Muscles and joints
Cardiovascular and autonomic systems
Your brain combines all of this information to determine where you are in space and how your body is moving.
After a concussion, this processing can become less efficient.
For example, your eyes may tell your brain that you are moving one direction while your vestibular system is sending a different signal. Your brain then has to work harder to reconcile the conflicting information.
That mismatch can produce dizziness, motion sensitivity and nausea.
Vestibular and visual dysfunction are well-recognized contributors to symptoms following mild traumatic brain injury, and nausea can occur alongside dizziness and other vestibular or oculomotor symptoms.
But vestibular dysfunction isn't the only possible explanation.
What Causes Nausea After a Concussion?
There are several common contributors to post-concussion nausea.
1. Vestibular Dysfunction
Your vestibular system is located primarily in your inner ears and helps your brain understand movement, balance and spatial orientation.
When the vestibular system is disrupted after a concussion, you may experience:
Nausea
Dizziness
Vertigo
Motion sensitivity
Imbalance
Feeling sick in a car
Difficulty walking through a busy environment
Increased symptoms when turning your head
A 2025 systematic review of vestibular dysfunction after mild traumatic brain injury found that vestibular symptoms can include dizziness, imbalance, vertigo, gait disturbances and vestibulo-ocular dysfunction.
If your nausea consistently gets worse when you move your head or body, vestibular dysfunction should be considered.
2. BPPV After a Concussion
A concussion or other head injury can also trigger benign paroxysmal positional vertigo (BPPV).
BPPV occurs when tiny calcium carbonate crystals in the inner ear become displaced into one of the semicircular canals.
Typical symptoms include:
Sudden spinning when rolling over in bed
Vertigo when lying down
Dizziness when looking up or down
Brief episodes of intense dizziness
Nausea or vomiting associated with the vertigo
BPPV is different from the broader vestibular dysfunction that can occur after a concussion.
The good news is that BPPV is often highly treatable with a specific canalith repositioning maneuver.
If your nausea is accompanied by brief, intense episodes of spinning triggered by changing your head position, BPPV is worth evaluating.
Learn more about Vertigo When Lying Down and BPPV Treatment
3. Visual and Vestibulo-Ocular Dysfunction
Your eyes and inner ears have to work together constantly.
When you walk, turn your head, read, scroll on your phone, or move through a visually busy environment, your brain has to coordinate information from your eyes and vestibular system.
After a concussion, this system can become dysfunctional.
You may notice:
Nausea when reading
Nausea while using a computer or phone
Headaches with visual tasks
Difficulty focusing
Blurry or double vision
Symptoms in grocery stores or other busy environments
Motion sickness
Dizziness when watching moving objects
This is one reason someone can feel nauseous without actually having a stomach problem.
The problem may be coming from how the brain is processing visual and movement information.
Recent research continues to identify neuro-oculomotor and vestibular dysfunction as important components of persistent symptoms after mild traumatic brain injury.
4. Autonomic Dysfunction
The autonomic nervous system regulates functions such as:
Heart rate
Blood pressure
Blood flow
Digestion
Breathing
Temperature regulation
A concussion can affect autonomic regulation in some people.
This can lead to symptoms such as:
Nausea
Lightheadedness
Racing heart
Exercise intolerance
Feeling worse when standing
Fatigue
Headaches
Feeling faint
Symptoms that increase with physical exertion
Research has identified altered autonomic function following mild traumatic brain injury, although the exact timing and clinical significance vary between individuals.
If your nausea gets worse when you're upright, exercising, or doing more activity, autonomic dysfunction may be part of the picture.
5. Migraine or Post-Traumatic Migraine
A concussion can trigger migraine-type headaches even in someone who did not previously experience migraines.
Post-traumatic migraine can involve:
Headache
Nausea
Light sensitivity
Sound sensitivity
Visual sensitivity
Dizziness
Motion sensitivity
Sometimes the nausea is actually more closely related to the migraine process than to the concussion itself.
If nausea occurs with significant headache, light sensitivity, sound sensitivity, or visual symptoms, migraine should be considered as part of the evaluation.
6. Neck Dysfunction
Your neck contains an enormous amount of sensory information that helps your brain understand where your head is in relation to your body.
After a concussion—particularly one involving a whiplash-type mechanism—the cervical spine can also contribute to dizziness, headache, imbalance and nausea.
This is one reason concussion treatment shouldn't automatically focus only on the brain.
The neck, eyes, inner ears and autonomic nervous system all interact.
A good concussion evaluation looks at the whole system rather than assuming every symptom comes from one source.
What Does Post-Concussion Nausea Feel Like?
Nausea after a concussion can look different from person to person.
You might experience:
A constant feeling of queasiness
Waves of nausea
Nausea when standing
Nausea when exercising
Nausea when turning your head
Motion sickness
Nausea when riding in a car
Nausea while reading
Nausea when using screens
Nausea in busy visual environments
Nausea accompanied by dizziness or vertigo
Nausea associated with headaches
The pattern of your nausea can provide important clues about what is driving it.
How Long Does Nausea Last After a Concussion?
There is no single timeline for post-concussion nausea.
Some people experience nausea primarily during the early phase after injury. Others continue to experience nausea because an underlying vestibular, visual, migraine, cervical, or autonomic problem has persisted.
This distinction is important.
Persistent nausea isn't something you simply have to tolerate.
If nausea continues, becomes more easily triggered, or interferes with eating, drinking, exercise, work, school, or daily activities, the next step is to determine what is driving it.
What Can You Do for Nausea After a Concussion?
The most effective strategy is to identify the source of the nausea rather than simply trying to suppress the symptom.
That said, there are several things you can do at home that may help while you address the underlying problem.
Stay Hydrated
Dehydration can make nausea, dizziness and headaches worse.
Sip fluids throughout the day. If you are sweating, exercising, or struggling to maintain hydration, an electrolyte drink can also be useful.
Eat Regularly
Going long periods without eating can make nausea and lightheadedness worse.
Try smaller, more frequent meals if larger meals are difficult to tolerate.
Prioritize nutrient-dense whole foods and adequate protein to support your body's recovery.
Ginger Can Help With Nausea
Ginger is commonly used to help manage nausea and may be useful as a supportive strategy for some people.
It isn't treating the underlying concussion dysfunction, but it may make nausea more manageable while you address the cause.
Don't Make “Rest” Your Treatment Plan
If nausea is keeping you from moving, it can be tempting to spend the day lying down and avoiding activity.
But avoiding movement indefinitely does not address the underlying problem.
For many people with persistent concussion symptoms, appropriately prescribed physical activity and rehabilitation are important components of recovery.
Exercise can also be particularly important when autonomic dysfunction or exercise intolerance is contributing to symptoms. Research has found that targeted aerobic exercise can improve concussion recovery and persistent symptoms in appropriate patients.
The key is to determine what type of activity your nervous system needs and how to progress it appropriately.
Can Exercise Help Post-Concussion Nausea?
Absolutely—when the nausea is being driven by a system that needs to be retrained.
For example, if nausea is related to:
Vestibular dysfunction
Motion sensitivity
Visual-vestibular dysfunction
Autonomic dysfunction
Reduced exercise tolerance
then appropriately selected exercises can be an important part of treatment.
Vestibular rehabilitation has been shown to improve dizziness and related symptoms following concussion, and more recent research continues to support targeted vestibular rehabilitation rather than relying solely on symptom avoidance.
The goal isn't simply to make you avoid everything that causes nausea.
The goal is to retrain the system that is producing the symptom.
What Does Treatment for Post-Concussion Nausea Look Like?
Treatment depends on the cause.
A concussion-focused physical therapy evaluation may look at:
Vestibular function
To determine whether your inner-ear and balance systems are contributing.
Eye movements and visual function
To determine whether your eyes and brain are having difficulty working together.
Cervical function
To determine whether your neck is contributing to dizziness, headaches or nausea.
Autonomic function
To determine whether heart rate, blood pressure or exercise tolerance are contributing.
Balance and movement
To determine how your brain is processing sensory information while you move.
Exercise tolerance
To determine whether your cardiovascular/autonomic system is responding appropriately to physical activity.
This is why treating post-concussion nausea isn't necessarily about finding a medication that makes the nausea disappear.
The more important question is why your brain and body are producing the nausea in the first place.
When Should You Seek Medical Attention for Nausea After a Head Injury?
Nausea can be a normal concussion symptom, but repeated vomiting or rapidly worsening symptoms after a head injury warrant medical evaluation.
Seek urgent medical attention if nausea or vomiting occurs along with concerning symptoms such as:
Repeated vomiting
A severe or progressively worsening headache
Increasing confusion
Significant drowsiness or difficulty waking
Seizure
New weakness or numbness
Slurred speech
Significant difficulty walking
Loss of consciousness
New or worsening neurological symptoms
These symptoms can indicate a more serious problem than an uncomplicated concussion.
Post-Concussion Nausea and Dizziness
If your nausea occurs together with dizziness, it is especially important to determine what type of dizziness you are experiencing.
For example:
Spinning when you roll over in bed?
Think about BPPV.
Nausea when moving your head or walking?
Vestibular dysfunction may be involved.
Nausea while reading or using screens?
Visual or vestibulo-ocular dysfunction may be contributing.
Nausea and lightheadedness when standing or exercising?
Consider autonomic dysfunction.
Nausea with headache and light sensitivity?
Migraine may be involved.
And sometimes more than one system is contributing at the same time.
This is why a comprehensive concussion evaluation can be so valuable.
The Bottom Line
Post-concussion nausea is common—but it isn't something you simply have to live with.
Nausea can be caused by vestibular dysfunction, BPPV, visual problems, migraine, autonomic dysfunction, cervical dysfunction, or a combination of several systems.
The key is to identify what is driving the nausea and treat that underlying problem.
If your nausea is persistent, triggered by movement, exercise, screens, busy environments, or changes in position, those patterns can provide important clues about where the problem is coming from.
Still Dealing With Persistent Concussion Symptoms?
The Concussion Solution provides a structured approach to addressing the systems that can contribute to persistent concussion symptoms, including exercise tolerance, vestibular function, autonomic regulation, visual function, the neck, and more.
Looking for in-person concussion care?
Happy Brain Physical Therapy provides individualized concussion and vestibular physical therapy in the Park City area.
In-person, virtual, and in-home options available.
Related Articles
Why Am I Still Dizzy After a Concussion?
Can a Concussion Cause Vertigo? Causes of Dizziness After Concussion
Post-Concussion Autonomic Dysfunction: Why It Happens & What Can Help
How to Manage Screen Time After a Concussion
Concussion Recovery Tips You Can Do at Home
