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Dizziness After Normal Tests: Common Causes That Standard Workups Miss

Why a normal MRI, blood work or hearing test doesn't always explain ongoing dizziness, and what to look at next.

Many people with chronic dizziness, some of whom feel dizzy all the time, are told their MRI, blood work, heart tests and hearing test are all normal, yet they still feel dizzy, off balance or unsteady. Those tests are important because they rule out serious structural problems, but most of them don’t measure how the inner ear, eyes, neck and brain work together to keep you balanced.[1][3] Several common causes of dizziness, including positional vertigo, vestibular migraine and persistent postural-perceptual dizziness (PPPD), are found through a careful history and functional testing rather than imaging, and many of them respond well to targeted rehabilitation.[1][3][11]

Key Facts

  • Dizziness is very common. Large population studies find that dizziness affects about 15% to more than 20% of adults each year.[1]
  • Balance problems often go unrecognized. In a national U.S. survey, about 35% of adults aged 40 and older had signs of vestibular dysfunction on a simple balance test, and those who also felt dizzy had a 12-fold higher risk of falling.[2]
  • Two of the most common causes are underdiagnosed. Population research shows that benign paroxysmal positional vertigo (BPPV) and vestibular migraine are both largely underdiagnosed.[1]
  • Imaging isn’t how most of these are found. BPPV is diagnosed with positional tests in the exam room, and the national guideline advises against routine imaging for it.[3] Vestibular migraine and PPPD are diagnosed from the symptom pattern using published criteria.[5][6]
  • One normal inner-ear test doesn’t rule everything out. In 644 dizzy patients, two standard inner-ear tests (caloric testing and the video head impulse test) disagreed in about 37% of cases.[7]

Why Tests Can Be Normal When You Still Feel Dizzy

Most routine tests answer one question: is there a dangerous or structural cause, such as a stroke, tumor, infection, heart rhythm problem or major hearing loss? When the answer is no, that’s good news, but it isn’t the same as an explanation. Dizziness often comes from a problem with function rather than structure, such as how the inner ear senses motion, how the eyes stay steady during head movement, how the brain combines balance signals, or how blood pressure and heart rate adjust when you stand. Those problems don’t show up on an MRI or in blood work, and many are only found with targeted exam maneuvers or specialized vestibular and eye-movement testing.[3][7]

Common Causes of Chronic Dizziness That Standard Workups Miss

  • Benign paroxysmal positional vertigo (BPPV). Brief spinning triggered by rolling over, looking up or bending down, caused by displaced crystals in the inner ear. It’s found with positional tests, not imaging.[3] In one study of older adults in a geriatric clinic, 9% had BPPV that had never been recognized, and they were more likely to have fallen in the previous 3 months.[4]
  • Vestibular migraine. Attacks of dizziness or vertigo lasting 5 minutes to 72 hours in people with a history of migraine. A headache isn’t required during every attack, and light or sound sensitivity or visual aura can count instead.[5] New 2026 eye-tracking research shows it often leaves measurable signs in eye movements and reaction time.[13] See our brief on Vestibular Migraine vs. PPPD.
  • Persistent postural-perceptual dizziness (PPPD). Dizziness or unsteadiness on most days for 3 months or more, worse when standing, moving or in busy visual environments, usually starting after an inner-ear problem, concussion, migraine or a stressful event.[6]
  • Inner-ear weakness missed by a single test. Different vestibular tests measure different speeds of head movement, so one normal result doesn’t always mean the inner ear is working normally.[7]
  • Orthostatic intolerance and POTS. Lightheadedness when standing that comes from how the nervous system controls heart rate and blood pressure. Postural tachycardia syndrome (POTS) is defined by a sustained heart-rate rise of at least 30 beats per minute within 10 minutes of standing in adults, without a drop in blood pressure.[8] Learn more on our Dysautonomia & POTS page and our brief on POTS treatment without medication.
  • Neck-related (cervicogenic) dizziness. Unsteadiness linked to neck pain or stiffness, often after whiplash. It’s diagnosed only after other causes are ruled out.[9]
  • Dizziness after a concussion. Concussion can affect the inner ear, eye movements, the neck and the autonomic nervous system at the same time, even when imaging is normal. See our Concussion page.

Medication side effects, low blood pressure, anemia, thyroid problems and anxiety can also cause dizziness, which is why your physician’s medical workup still matters.

What the Research Shows

Vestibular rehabilitation has the strongest evidence. A Cochrane review of 39 studies with 2,441 people found that people who did vestibular rehabilitation had about 2.7 times the odds of reporting less dizziness compared with those who had no treatment or a sham.[11] The American Physical Therapy Association’s 2022 guideline says, based on strong evidence, that clinicians should offer vestibular rehabilitation to adults with inner-ear balance loss.[12]

For BPPV, the national guideline recommends repositioning maneuvers rather than vestibular-suppressant medications or routine imaging.[3] The Cochrane review also found that repositioning maneuvers work better than general vestibular exercises for BPPV in the short term.[11]

For neck-related dizziness, a 2022 meta-analysis of 13 randomized trials found moderate-quality evidence that manual therapy reduces dizziness, neck and balance symptoms, and very-low-quality evidence that adding exercise strengthens the effect.[9] In one randomized trial, two types of manual therapy still reduced dizziness frequency and handicap at 12 months compared with a placebo treatment.[10]

For vestibular migraine and PPPD, vestibular rehabilitation is a core part of treatment, often combined with migraine management, education and, in some cases, medication or cognitive behavioral therapy prescribed or provided by other clinicians.[5][6]

Who Is a Good Candidate

  • People who have had a medical workup for dizziness, with normal or inconclusive results, and still have symptoms
  • People with dizziness triggered by head movement, rolling over, standing, screens, stores or traffic
  • People whose dizziness started after a concussion, an inner-ear infection, a whiplash injury or a migraine flare
  • People who are ready to do a daily home exercise program between visits

When to See a Physician First

Call 911 or go to the emergency room for new dizziness with sudden weakness or numbness, trouble speaking, double vision, trouble walking, a sudden severe headache, chest pain, fainting, or confusion after a head injury. A normal brain scan in the first day or two doesn’t completely rule out a stroke. Early MRI can miss up to 20% of strokes in the first 24 to 48 hours, and dizziness or unsteadiness can be the only symptom.[14]

See your primary care doctor, a neurologist or an ENT before rehabilitation if you have:

  • Sudden hearing loss or new ringing in one ear
  • Dizziness that is new and getting steadily worse
  • Fainting or near-fainting, a racing or irregular heartbeat, or chest pain
  • Not yet had any medical evaluation for your dizziness

If you come to us first and need one of these evaluations, we’ll refer you.

What Care Looks Like at Harcourt Brain Center

We start where a normal workup leaves off. Your first visit includes a detailed history focused on the timing and triggers of your dizziness, which research shows is key to an accurate diagnosis,[14] and a functional neurological exam. Depending on your symptoms, we may add:

  • Positional testing for BPPV
  • VOG eye-movement testing and Spryson eye-tracking tests of saccades, smooth pursuit, gaze stability and reaction time
  • Rotary chair testing to measure inner-ear responses across different speeds of movement
  • BTrackS balance testing
  • Heart rate and blood pressure checks lying down and standing when POTS or orthostatic intolerance is suspected
  • A neck exam, including head and neck position sense

From there, your plan targets what we find. That may include repositioning maneuvers for BPPV, vestibular rehabilitation, eye-movement training, cervical spine proprioceptive retraining, an autonomic conditioning program, or migraine care using Dr. Harcourt’s 4-Factor Migraine Framework. We re-test at planned checkpoints so you can see measurable change. We don’t prescribe medication. If medication, further imaging or another specialist would help, we’ll coordinate with your physician, and with your permission we share findings and progress reports with your doctors. Learn more on our Dizziness and Vertigo page and our Clinical Rationale & Evidence page. Clinicians can find referral details on our For Clinicians page.

Limitations

  • Functional tests support a diagnosis but don’t replace your physician’s medical evaluation, and a normal functional test doesn’t rule out every cause.
  • Evidence for neck-related dizziness is moderate at best, and the diagnosis itself depends on excluding other causes.[9]
  • The study on unrecognized BPPV was done in one older, inner-city clinic population, so the exact rate may differ elsewhere.[4]
  • Some people have more than one cause at the same time, which can make recovery slower.
  • Results vary. Some people improve a lot, some improve partly, and some need ongoing support. We set checkpoints at the start and adjust the plan or refer you if progress stalls.

Related Condition Briefs

Frequently Asked Questions

Why am I still dizzy if my MRI was normal?

An MRI looks for structural problems such as stroke or tumors. Many common causes of dizziness, including BPPV, vestibular migraine, PPPD and some inner-ear problems, affect how the balance system works rather than its structure, so they don’t show up on imaging.

Does a normal hearing test mean my inner ear is fine?

Not necessarily. Hearing and balance share the inner ear, but they’re tested separately. A normal hearing test doesn’t measure the balance organs, and even different balance tests can disagree.

Is my dizziness all in my head?

No. Normal tests don’t mean your symptoms aren’t real. Conditions such as PPPD and vestibular migraine are recognized diagnoses with published criteria, and they’re treatable.

What tests do you do that I may not have had?

Depending on your symptoms, we may do positional testing, VOG and Spryson eye-tracking tests, rotary chair testing, computerized balance testing, standing heart rate and blood pressure checks, and a neck position-sense exam.

How long does it take to feel better?

It depends on the cause. BPPV often improves within a few visits of repositioning maneuvers, while vestibular migraine, PPPD and post-concussion dizziness usually need several weeks to a few months of rehabilitation. We set checkpoints so you can see whether it’s working.

Why do I feel dizzy all the time?

Constant or chronic dizziness is most often caused by a problem with how the balance system works rather than its structure, such as PPPD, vestibular migraine, inner-ear weakness, neck-related (cervicogenic) dizziness or POTS. Medication side effects and medical conditions can also contribute, so both a medical workup and a functional balance exam matter.

This page is for education and doesn’t replace care from your physician. If you have a sudden severe headache, new weakness or numbness, trouble speaking, vision loss, fainting, or confusion after a head injury, call 911 or go to the nearest emergency room.

Medically reviewed by Dr. Adam Harcourt, DC, DACNB, FACFN, FABVR. Last reviewed October 2026.

References

  1. Neuhauser HK. The epidemiology of dizziness and vertigo. Handb Clin Neurol. 2016;137:67-82. PubMed 27638063
  2. Agrawal Y, et al. Disorders of balance and vestibular function in US adults: data from the National Health and Nutrition Examination Survey, 2001-2004. Arch Intern Med. 2009;169(10):938-44. PubMed 19468085
  3. Bhattacharyya N, et al. Clinical Practice Guideline: Benign Paroxysmal Positional Vertigo (Update). Otolaryngol Head Neck Surg. 2017;156(3_suppl):S1-S47. PubMed 28248609
  4. Oghalai JS, et al. Unrecognized benign paroxysmal positional vertigo in elderly patients. Otolaryngol Head Neck Surg. 2000;122(5):630-4. PubMed 10793337
  5. Lempert T, et al. Vestibular migraine: Diagnostic criteria. J Vestib Res. 2022;32(1):1-6. PubMed 34719447
  6. Staab JP, et al. Diagnostic criteria for persistent postural-perceptual dizziness (PPPD): Consensus document of the committee for the Classification of Vestibular Disorders of the Bárány Society. J Vestib Res. 2017;27(4):191-208. PubMed 29036855
  7. Jung HJ, et al. Clinical Characteristics of Dizzy Patients Showing Discordant Results Between Bithermal Caloric Test and Video Head Impulse Test. J Clin Med. 2025;14(12):4350. PubMed 40566095
  8. Sheldon RS, et al. 2015 Heart Rhythm Society expert consensus statement on the diagnosis and treatment of postural tachycardia syndrome, inappropriate sinus tachycardia, and vasovagal syncope. Heart Rhythm. 2015;12(6):e41-63. PubMed 25980576
  9. De Vestel C, et al. Systematic review and meta-analysis of the therapeutic management of patients with cervicogenic dizziness. J Man Manip Ther. 2022;30(5):273-283. PubMed 35383538
  10. Reid SA, et al. Manual therapy for cervicogenic dizziness: Long-term outcomes of a randomised trial. Man Ther. 2015;20(1):148-56. PubMed 25220110
  11. McDonnell MN, Hillier SL. Vestibular rehabilitation for unilateral peripheral vestibular dysfunction. Cochrane Database Syst Rev. 2015;1:CD005397. PubMed 25581507
  12. Hall CD, et al. Vestibular Rehabilitation for Peripheral Vestibular Hypofunction: An Updated Clinical Practice Guideline From the Academy of Neurologic Physical Therapy of the American Physical Therapy Association. J Neurol Phys Ther. 2022;46(2):118-177. PubMed 34864777
  13. Ceriani CEJ, Braverman A, Kiderman A. Objective oculomotor, vestibular, reaction time, and cognitive signatures of vestibular migraine. Front Neurol. 2026;17:1789811. PubMed 42246042
  14. Tarnutzer AA, et al. Diagnostic Errors in the Acutely Dizzy Patient: Lessons Learned. Brain Sci. 2025;15(1):55. PubMed 39851423

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