Chronic dizziness

What is chronic dizziness, and what is PPPD?

Dizziness is one of the most common reasons adults see a doctor: population studies estimate that vestibular vertigo alone affects about 7% of adults at some point in life. Most episodes resolve as the underlying problem settles, whether that is an inner-ear infection, loose crystals in the balance canals, or a migraine. Chronic dizziness is what remains when the sensation persists for three months or more, often long after the original problem has healed.

In 2017, the Bárány Society, the international society for vestibular research, published consensus criteria for the condition behind most of these persistent cases: persistent postural-perceptual dizziness, abbreviated PPPD. The diagnosis unified several older labels, including chronic subjective dizziness, phobic postural vertigo, and visual vertigo, into a single well-defined syndrome. The core criteria:

• Dizziness, unsteadiness, or non-spinning vertigo on most days for 3 months or more, often waxing and waning through the day rather than constant at one intensity.
• Symptoms are made worse by three things: being upright, movement (your own or the world's, as in walking or riding in a car), and busy visual environments such as supermarket aisles, scrolling screens, crowds, and patterned carpets.
• The condition was set off by an event that caused vertigo, unsteadiness, or dizziness, most often a vestibular disorder but sometimes another medical event or intense psychological distress.
• Symptoms cause real distress or interfere with daily life, and are not better explained by another diagnosis.

People with PPPD often describe a rocking or swaying sensation, a feeling of walking on a mattress or a boat, or a foggy non-spinning motion inside the head. Notably absent is true spinning vertigo. If the room whirls in discrete attacks, that points to a different or additional diagnosis.

How does PPPD start?

Almost nobody develops PPPD out of nowhere. It nearly always begins with a real event that genuinely disturbs balance:

• Vestibular neuritis, an inner-ear inflammation that causes days of severe spinning vertigo.
• BPPV, or benign paroxysmal positional vertigo, where loose crystals in the balance canals trigger brief spins on rolling over or looking up.
• Vestibular migraine: migraine attacks whose main feature is dizziness.
• Concussion. Dizziness is one of the most common persistent symptoms after a mild traumatic brain injury.
• A panic attack or acute anxiety episode, which can produce genuine dizziness through hyperventilation and autonomic arousal.

During the acute event, the brain does exactly what it should. Spinning is dangerous and falls are dangerous, so it switches balance control into high-alert mode: rely on vision instead of the untrustworthy inner ear, stiffen the postural muscles, walk carefully, and monitor balance consciously instead of leaving it on autopilot. In the short term this is smart engineering.

In PPPD, the event resolves. The inflammation clears, the crystals are repositioned, the concussion heals, but the emergency strategy stays switched on. Prospective studies following people after acute vestibular events find that roughly a quarter develop persistent PPPD-type dizziness over the following 3 to 12 months. What predicts who gets stuck is not the severity of the inner-ear damage or how well the ear recovered. It is anxiety during the acute phase, high body vigilance, and visual dependence. The risk lives in the brain's response to the event rather than in the ear.

Why is PPPD a functional problem rather than damage?

On testing, people with established PPPD typically have normal or fully compensated vestibular function. The ear works. What has changed is how the brain runs balance, and three interlocking habits maintain the dizziness:

• Visual dependence. The brain keeps weighting vision heavily and the inner ear lightly, which was appropriate during the acute event and disorienting after it. Any environment where vision is busy or ambiguous (a supermarket, traffic, a scrolling screen) now reads as self-motion, producing dizziness in the very places sufferers dread.
• Stiffened postural control. The brain keeps using the careful, co-contracted, high-stakes balance strategy meant for standing on a cliff edge. Rigid posture generates more sway signal, not less, because a stiff mast sways more than a supple one. That feeds the sense of unsteadiness.
• Vigilance. Balance normally runs unconsciously. In PPPD the brain monitors it constantly, checking for sway the way a person with chronic pain scans for twinges. Attention amplifies the signal it watches, a self-sustaining loop closely related to central sensitization in pain.

This is why PPPD is called a functional disorder: the hardware is intact and the software, meaning the control strategy, is misconfigured. That is not a euphemism for imaginary. Functional brain imaging in PPPD shows altered activity and connectivity in the networks that integrate vestibular, visual, and threat information. The dizziness is generated by real brain processes. Those processes are changeable, which is what makes the condition treatable.

Avoidance completes the loop. Dizzy places get avoided, the balance system loses the practice it needs to recalibrate, and the world's danger list grows. It is the vestibular twin of kinesiophobia: fear-avoidance that maintains the very sensitivity it is trying to escape.

Which dizziness symptoms are red flags?

Before chronic dizziness can be treated as PPPD, dangerous causes must be excluded. Seek emergency care for dizziness with any of the following:

• Sudden hearing loss in one ear. Sudden sensorineural hearing loss is an emergency where hours matter for treatment.
• Double vision, slurred speech, weakness, numbness, severe incoordination, or trouble walking. These can signal a stroke affecting the brainstem or cerebellum, which can masquerade as ordinary vertigo.
• A new, severe, or worst-ever headache accompanying the dizziness.
• Chest pain, palpitations, or fainting with dizziness, since the heart rather than the balance system may be the source.

Also arrange prompt (non-emergency) medical assessment for progressive one-sided hearing loss or tinnitus in one ear, which warrants evaluation for a growth on the hearing-and-balance nerve, as well as for dizziness with new neurological symptoms of any kind, or dizziness after a significant head injury that is worsening rather than improving.

How is PPPD diagnosed?

PPPD is a positive clinical diagnosis, not a leftover label. A clinician, usually a neurologist, otolaryngologist, or vestibular specialist, makes it by matching the history against the Bárány Society criteria: the three-month duration, the three characteristic aggravators (upright posture, motion, complex visual environments), a triggering event, and real-life impact.

Examination and testing serve two purposes: excluding red-flag causes, and documenting what set PPPD off. Vestibular function tests, hearing tests, and imaging are often normal or show only the healed footprint of the original event. A normal MRI does not mean nothing is wrong. It means the problem is in how the balance networks are functioning, which routine scans do not measure.

It is also common for PPPD to coexist with its trigger: someone can have ongoing vestibular migraine or recurrent BPPV *and* PPPD layered on top. Both then need treating. Anxiety and depression frequently travel with PPPD, sometimes preceding it and sometimes caused by months of feeling unmoored. Treating them helps, but PPPD is classified as a vestibular disorder, not an anxiety disorder.

For coding: ICD-11 gives PPPD its own code, AB32.0. ICD-10 predates the diagnosis and has no specific code, so clinicians typically document it under R42 (dizziness and giddiness) or H81.- (disorders of vestibular function). Coding is your clinician's call. This is here so your paperwork makes sense.

What treatments help chronic dizziness and PPPD?

Because PPPD is a maintained strategy rather than ongoing damage, treatment is retraining. Two approaches carry the best evidence, and they work best together.

Vestibular rehabilitation: graded exposure for the balance system

Vestibular rehabilitation therapy (VRT) is a structured exercise program of head movements, gaze-stabilization drills, balance tasks, and progressive exposure to motion and busy visual environments. A Cochrane review of 39 randomized trials found moderate to strong evidence that vestibular rehabilitation is safe and effective for unilateral vestibular problems, and it is the standard physical therapy for PPPD. For PPPD specifically, the art is in the dosing: exercises are deliberately graded and gentle, provoking mild, brief symptoms that the system can habituate to rather than flooding it. Symptoms during exercises are the balance system recalibrating, not evidence of harm.

Cognitive behavioral therapy: retraining the vigilance

CBT targets the other half of the loop: the vigilance, catastrophic interpretations, and avoidance that keep the emergency mode running. In a randomized controlled trial, even a brief three-session CBT program produced significant reductions in dizziness handicap and avoidance behaviors, with improvements maintained at follow-up. The skills are familiar from modern chronic pain care: reinterpreting the sensation as a false alarm from a safe system, dropping safety behaviors, and re-entering avoided places step by step, which is the same graded-exposure logic used against kinesiophobia.

Medications

Medication options exist. SSRIs and SNRIs are the most studied in PPPD, with evidence that is promising but based mostly on uncontrolled studies. Vestibular suppressants like meclizine are generally discouraged for daily long-term use because they can slow the recalibration the brain needs to do. Whether any medication belongs in your plan, and any change to what you already take, is a conversation with your prescriber and never a solo decision.

Treating the companions matters too: an untreated trigger that is still active (vestibular migraine, recurrent BPPV) or significant anxiety or depression will keep re-arming the system, so a good plan addresses them alongside the retraining.

How is chronic dizziness connected to concussion?

Dizziness is one of the most common symptoms after a concussion, and in most people it settles within days to weeks as the brain recovers. When dizziness persists for months after a mild traumatic brain injury, PPPD is one of the most important explanations to consider. The concussion plays the role of the triggering event, and the same visual dependence, stiffness, and vigilance maintain the symptom after healing.

The overlap runs deep. Persistent post-concussion symptoms and PPPD share the same paradox of symptoms outlasting measurable injury, and the same treatment logic: reassurance grounded in a real mechanism, then graded re-exposure to the activities and environments the system has flagged as dangerous, rather than indefinite rest and avoidance. Screens and scrolling deserve a special mention. They are among the most commonly reported symptom triggers in both conditions, and both respond to graduated, planned exposure rather than total abstinence.

If your chronic dizziness began with a head injury, it is worth reading the two pages together. The conditions are close cousins and are often diagnosed in the same clinic visit.

When should you see a doctor about dizziness?

• Immediately (emergency care) for any red flag above: sudden hearing loss, double vision, slurred speech, weakness or severe incoordination, worst-ever headache, chest pain, or fainting.
• Promptly for any new, unexplained dizziness, dizziness with one-sided hearing changes or tinnitus, dizziness causing falls, or dizziness after a head injury.
• For persistent symptoms. If dizziness has lasted weeks to months, ask your clinician directly about PPPD and whether referral to a vestibular specialist or vestibular physical therapist makes sense. The diagnosis is still young, and naming it is often the turning point.

A useful question to bring to the appointment: *"My tests are normal but the dizziness is persisting. Could this be persistent postural-perceptual dizziness, and can I be referred for vestibular rehabilitation?"* People often live with treatable chronic dizziness for years because neither they nor their first clinician had a name for it.

If the months of symptoms have taken a toll on mood, confidence, or activity, that is part of the condition rather than a personal failing. The same is true across chronic symptom conditions, and the approaches in living with chronic pain translate almost word for word.