What the ear crystals are
The inner ear has two parts: the cochlea, for hearing, and the vestibular system, for balance. The vestibular system contains three semicircular canals, which detect head rotation, and two small chambers (the utricle and saccule), which detect gravity and straight-line movement. In the utricle and saccule, a gel-like membrane is covered with thousands of microscopic calcium carbonate crystals called otoconia. Their weight bends tiny sensory hairs when you tilt your head, telling the brain which way is down.
Otoconia are normally anchored in place. With age, after a head injury, during a period of inactivity or after an inner ear infection, some can detach. If they float into one of the semicircular canals, which are not meant to contain particles, the problem starts.
How loose crystals cause vertigo (BPPV)
The semicircular canals are filled with fluid. When you turn your head, the fluid moves and bends a sensor at the base of the canal. Normally the fluid stops when the head stops. Loose crystals, however, are heavier than the fluid: when you lie down or tilt your head, they keep sinking for a few seconds, dragging the fluid and stimulating the sensor. The brain receives a strong rotation signal while the eyes and body say you are still, and you feel the room spinning.
In about 80 to 90 per cent of cases the crystals are in the posterior canal. Less often they are in the horizontal (lateral) canal, which causes vertigo when turning from side to side in bed, and rarely in the anterior canal.
Typical symptoms
- Brief, intense spinning vertigo lasting seconds to under a minute.
- Triggered by specific movements: lying down, rolling over in bed, getting out of bed, looking up to a shelf or bending forward.
- Nausea, sometimes vomiting, during attacks.
- A lingering feeling of unsteadiness or light-headedness between attacks.
- No hearing loss, ringing or ear pain caused by BPPV itself.
Many people notice it first thing in the morning. For dizziness that starts mainly when you lie down, see also dizzy when lying down.
Why the crystals come loose
- Age: BPPV becomes more common after the age of 50 as the otoconial membrane weakens.
- Head injury: even a mild knock can dislodge crystals, sometimes on both sides.
- Inner ear disorders: vestibular neuritis and Ménière's disease can be followed by BPPV.
- Long periods lying down: after surgery, illness or bed rest.
- Low vitamin D and osteoporosis: associated with BPPV and with recurrence in some studies.
- Often no clear cause: many cases are idiopathic.
How BPPV is diagnosed
A doctor, ENT specialist or trained physiotherapist performs the Dix-Hallpike test: you sit on a couch, your head is turned 45 degrees to one side and you are quickly laid back with the head slightly below the couch. If crystals are in the posterior canal, this provokes brief vertigo and a characteristic flickering eye movement (nystagmus) after a few seconds. The direction of the eye movement identifies the ear and the canal involved. A roll test checks the horizontal canal.
Scans are not needed when the history and the test are typical. Further tests are done if the eye movements are unusual, the dizziness is constant, or there are other neurological symptoms or hearing changes.
How the crystals are put back: repositioning manoeuvres
The aim is to guide the crystals out of the canal and back into the utricle, where they are absorbed or settle harmlessly. Clinical practice guidelines recommend repositioning manoeuvres as the treatment of choice; medicines that suppress balance are not recommended for routine treatment.
- Epley manoeuvre: for the posterior canal. A sequence of four head and body positions, each held for 30 to 60 seconds, moves the crystals around the canal and out. It takes about 10 to 15 minutes.
- Semont manoeuvre: an alternative for the posterior canal using a quick movement from lying on one side to the other.
- Barbecue (Lempert) roll or Gufoni manoeuvre: for the horizontal canal.
One manoeuvre resolves BPPV in a large proportion of people, and a second session helps most of the rest. Once you know which side is affected, a clinician may teach you to do the Epley manoeuvre at home. Additional balance exercises help the residual unsteadiness; see vertigo exercises.
After treatment and recurrence
After a successful manoeuvre, you may feel slightly off-balance or queasy for a few days. Strict restrictions, such as sleeping upright, are no longer routinely recommended, although some clinicians advise avoiding the trigger position for the first night. Get up slowly and take care on stairs while you feel unsteady.
BPPV can come back: roughly one in three people have another episode within a few years. Recognising the pattern early means it can be treated quickly. If you have repeated episodes, a doctor may check vitamin D levels and bone health.
When dizziness is not loose crystals
- Constant vertigo lasting hours or days, especially with vomiting and difficulty walking.
- Dizziness with double vision, slurred speech, facial drooping, weakness or numbness: call emergency services, as these can be signs of a stroke.
- Sudden hearing loss or new ringing in one ear: see sudden hearing loss.
- A severe new headache with dizziness.
- Dizziness after a significant head injury.
- Attacks of vertigo lasting 20 minutes to hours with ear fullness and fluctuating hearing, which suggest Ménière's disease.
Episodes of vertigo with headache or light sensitivity may be vestibular migraine. For a general overview of vertigo causes, see vertigo.
Key points to remember
- The inner ear contains crystals (otoconia) that sense gravity.
- Loose crystals in a semicircular canal cause BPPV: short spins with head movements.
- The Dix-Hallpike test confirms it, and repositioning manoeuvres cure most cases.
- BPPV can recur but is usually easy to treat again.
- Constant vertigo or neurological symptoms need urgent assessment.
Questions about ear crystals
These answers are general information and do not replace an examination or individual medical advice.
What are ear crystals?
Tiny calcium carbonate particles (otoconia) in the inner ear that help sense gravity and head position.
How do I know if my ear crystals are out of place?
Brief spinning lasting under a minute when lying down, rolling over or looking up suggests BPPV. A clinician confirms it with a positional test.
Can ear crystals go back on their own?
Yes. Many episodes settle within weeks, but a repositioning manoeuvre usually resolves symptoms much faster.
How long does it take to fix ear crystals?
A manoeuvre takes about 10 to 15 minutes, and many people feel better after one or two sessions.
Can I do the Epley manoeuvre at home?
Yes, once a clinician has confirmed which ear and canal are affected and shown you how to do it safely.
Can stress make ear crystals come loose?
There is no clear evidence that stress dislodges crystals, but stress and poor sleep can make dizziness feel worse.
Sources
- NHS · Vertigo
- NIDCD (NIH) · Balance disorders
- Bhattacharyya N, et al. Clinical practice guideline: benign paroxysmal positional vertigo (update). Otolaryngol Head Neck Surg. 2017
This guide is for general information and does not replace medical advice. How a problem is diagnosed and treated depends on your examination and medical history. If you think you have an emergency, contact your local emergency services.