What is BPPV?
BPPV stands for benign paroxysmal positional vertigo, and the name describes it well: it is a benign (harmless) condition that causes sudden, brief (paroxysmal) attacks of vertigo brought on by changes in head position. It is one of the most common causes of vertigo, and its hallmark is that the spinning is triggered by specific movements — most classically rolling over in bed, lying down, sitting up, or tipping the head back to look up.
BPPV happens because of a problem in the balance organs of the inner ear. These contain tiny calcium crystals that normally sit in one part of the system; in BPPV, some of these crystals become dislodged and move into one of the fluid-filled canals that sense head rotation. When you move your head, the loose crystals disturb the fluid and send a false, brief signal of intense spinning to the brain. Understanding this explains why the vertigo is so position-dependent.
Symptoms of BPPV
The pattern of BPPV is quite characteristic, which helps distinguish it from other causes of dizziness. Typical features include:
- •Sudden, intense spinning vertigo triggered by head movements
- •Attacks brought on by rolling over in bed, lying down, sitting up, or looking up
- •Each episode is brief, usually lasting seconds to under a minute
- •Nausea, and occasionally vomiting, with the vertigo
- •A sense of unsteadiness that may linger briefly after the spinning stops
- •No hearing loss, ringing, or ear pain (which helps tell it apart from other conditions)
What causes BPPV?
BPPV is caused by tiny calcium carbonate crystals (sometimes called otoconia) becoming displaced from their normal position in the inner ear and moving into one of the semicircular canals, the loops that detect head rotation. Once loose in a canal, the crystals cause the fluid there to move abnormally with certain head positions, producing the false sensation of spinning. It is a mechanical problem, which is why it can often be fixed mechanically.
In many cases there is no obvious reason why the crystals become dislodged, and it simply happens, becoming more common with age. Sometimes it follows a head injury, a period of lying in bed for a long time, or an inner-ear condition such as labyrinthitis. BPPV can also recur, as the crystals can become dislodged again in the future, though the same simple treatments work each time. It is not a sign of a serious brain or nerve problem.
How is BPPV treated?
One of the most satisfying things about BPPV is that it can often be treated quickly and effectively with specific head-movement sequences called repositioning manoeuvres, the best known being the Epley manoeuvre. These guide the displaced crystals out of the semicircular canal and back to where they belong, where they no longer cause symptoms. Performed correctly, often by a doctor, physiotherapist or trained professional, they resolve BPPV in many people after one or a few sessions.
Because these manoeuvres need to be done correctly for the specific ear and canal involved, it is best to have BPPV diagnosed and the manoeuvre performed or taught by a professional rather than relying solely on guesswork. Some people are then taught exercises to do at home. Medication is generally not the main treatment, as it does not fix the underlying crystal displacement, though it may occasionally be used briefly for severe nausea. Most people recover well.
Living with and preventing BPPV
While waiting for treatment or if BPPV is mild, some practical measures help manage it. Moving the head more slowly and deliberately, especially with the movements that trigger vertigo, can reduce the intensity of attacks. Getting up gradually from lying down, and sleeping with the head slightly raised, may help some people. Because attacks are brief and position-triggered, knowing what sets them off allows you to brace for or avoid the worst triggers until treatment resolves it.
BPPV can come back weeks, months or years later, as the crystals can be dislodged again, but this is not a cause for alarm — the same repositioning manoeuvres work each time, and many people who have had it learn to recognise it quickly and seek prompt treatment. Because BPPV becomes more common with age, older people in particular benefit from having positional dizziness assessed, both to treat it and because steadier balance reduces the risk of falls.
When to see a doctor
It is worth seeing a doctor for positional vertigo, both to confirm it is BPPV and to have the repositioning treatment done, which is far more effective than waiting for it to pass. A doctor can usually diagnose BPPV from the characteristic history and a simple positional test in the clinic. Because BPPV does not cause hearing loss or other neurological symptoms, the presence of those would prompt looking for a different cause.
Certain accompanying symptoms mean you should seek prompt or urgent assessment rather than assuming BPPV: a severe headache, weakness or numbness, difficulty speaking, double vision, difficulty walking beyond the brief unsteadiness of an attack, or vertigo that is constant rather than triggered by position. These are not features of BPPV and need to be checked. For the classic brief, movement-triggered spinning, though, BPPV is the likely and very treatable cause.