Why Do I Feel Dizzy When Turning Over in Bed?

Have you ever turned over in bed or sat up in the morning and suddenly felt as though the room were spinning around you?

One of the most common causes of this type of dizziness is benign paroxysmal positional vertigo (BPPV), a condition affecting the balance organs of the inner ear.

Although the sensation can be frightening, BPPV is usually harmless and can often be treated effectively with simple repositioning manoeuvres.

What causes positional vertigo?

Deep inside the inner ear are tiny calcium carbonate crystals called otoconia, which normally help us detect changes in head position and movement.

Sometimes, these crystals become dislodged and enter one of the fluid-filled semicircular canals, most commonly the posterior semicircular canal.

When the head changes position, the displaced crystals move within the canal, producing abnormal signals to the brain.

As a result, the brain briefly perceives movement even though the body is stationary, creating the characteristic spinning sensation.

What are the typical symptoms?

BPPV commonly causes:

• Sudden episodes of spinning dizziness when turning over in bed, lying down or sitting up.

• Vertigo triggered by looking upwards or bending forwards.

• Brief episodes, usually lasting seconds and generally less than one minute.

• Sometimes nausea or a temporary feeling of unsteadiness.

BPPV does not typically cause hearing loss or tinnitus. If these symptoms occur, another or additional inner-ear condition may be responsible.

How is BPPV diagnosed?

The diagnosis is usually based on the characteristic symptoms and a clinical examination.

An ENT specialist may perform a Dix–Hallpike test, which involves carefully changing the patient's head and body position while observing for characteristic involuntary eye movements (nystagmus).

Other positional tests may be required depending on which semicircular canal is affected.

In typical, uncomplicated BPPV, MRI or CT imaging is generally unnecessary.

How is BPPV treated?

Fortunately, BPPV can often be treated without medication or surgery.

The most commonly used treatment for posterior canal BPPV is the Epley manoeuvre, a sequence of controlled head and body movements designed to guide the displaced crystals back towards their normal location.

Many patients experience significant improvement after one or a few treatment sessions.

Other repositioning manoeuvres may be more appropriate when different semicircular canals are involved.

Although BPPV sometimes resolves spontaneously, symptoms can recur.

Medication generally does not correct the underlying mechanical problem, and routine long-term use of vestibular suppressants is not recommended.

When should you see a doctor?

An ENT assessment is recommended if your dizziness is recurrent, persistent or interfering with your daily activities.

Although BPPV is a common cause of positional vertigo, not all dizziness is caused by BPPV.

Seek urgent medical attention if dizziness is accompanied by new weakness, difficulty speaking, double vision, an inability to walk normally, a sudden severe headache or sudden hearing loss.

These symptoms may indicate a different condition requiring prompt assessment.

Can BPPV come back?

Yes. BPPV can recur, sometimes months or years after successful treatment.

Fortunately, recurrent episodes often respond well to repositioning manoeuvres.

If you experience brief spinning sensations when turning over in bed, a specialist examination can help identify the cause and determine the most appropriate treatment.