Why lying down makes you dizzy
The inner ear contains the semicircular canals, which detect head rotation, and the otolith organs, which detect gravity and linear motion. In BPPV, small calcium carbonate crystals that normally sit in the utricle break loose and drift into a canal. When you change head position, they move and send false signals of rotation to the brain, causing a sudden spinning sensation and often nausea and abnormal eye movements (nystagmus). See mareos por ansiedad (Spanish) and vertigo.
BPPV: the most common cause
- Typical triggers: lying down, turning over in bed, getting up, looking up (top shelf), bending down.
- Duration: usually 10–60 seconds per episode, though you may feel unsteady for hours.
- No hearing loss, ringing or fullness in the ear in typical BPPV.
- Often affects one side, so lying on one side is worse than the other.
- Causes: age, head injury, previous inner-ear disease, prolonged bed rest, migraine and often no clear cause.
- It tends to recur, but repositioning manoeuvres work in most people.
Other possible causes
- Vestibular neuritis and labyrinthitis: inflammation of the vestibular nerve or inner ear after a viral infection, with constant vertigo for days. See vertigo.
- Ménière’s disease: episodes lasting 20 minutes to hours with ear fullness, tinnitus and hearing loss. See Ménière’s disease.
- Vestibular migraine. See vestibular migraine.
- Orthostatic hypotension: lightheadedness on standing, rather than lying down.
- Medicines: blood pressure drugs, sedatives, antidepressants, anticonvulsants.
- Anxiety and panic, which can cause lightheadedness and a floating feeling.
- Anaemia, low blood sugar, dehydration and heart rhythm problems.
- Neck problems and, rarely, central causes (brainstem, cerebellum, stroke, tumour).
Vertigo versus lightheadedness
Vertigo is a false sense of spinning or movement; lightheadedness is feeling faint or woozy; unsteadiness is feeling off-balance. Vertigo points to the inner ear or brain balance pathways; lightheadedness usually points to blood pressure, heart, blood sugar or anxiety. Describing exactly what you feel, how long it lasts and what sets it off helps the doctor narrow down the cause. See anxiety symptoms if lightheadedness comes with panic.
How BPPV is diagnosed
The clinician performs positional tests, most often the Dix–Hallpike manoeuvre, in which you are quickly lowered from sitting to lying with the head turned and tilted to see whether it provokes vertigo and characteristic eye movements. For horizontal canal BPPV, a supine roll test is used. No scans are usually needed for typical BPPV; imaging and hearing tests are considered when features are atypical, there are neurological signs or symptoms do not fit.
Treatment: repositioning manoeuvres
The Epley manoeuvre (and variants such as the Semont or Gufoni, depending on the canal) moves the crystals back to where they do not cause symptoms. A clinician usually performs it in a few minutes and it resolves BPPV in about 80% of people after one to three sessions. Some people can learn a home version, but doing it incorrectly can be ineffective and cause vomiting, so it is best to have it shown first and to know which ear is affected. Medicines such as meclizine or prochlorperazine only suppress symptoms and are not a cure; they are used briefly if nausea is severe.
Home care while you recover
- Move slowly when lying down, turning and getting up; sit on the edge of the bed for a minute before standing.
- Sleep with your head slightly raised using two pillows during an episode.
- Avoid sudden head movements, looking up for long or bending quickly.
- Take care to prevent falls: light at night, clear walkways, handrails.
- Stay hydrated and avoid alcohol while symptoms persist.
- Do not drive during episodes of vertigo.
- Vestibular rehabilitation exercises can help residual unsteadiness.
- Rest between exercises and do not push through severe nausea.
Recurrence and prevention
BPPV returns in about a third to half of people within a few years. If it recurs, the same manoeuvre usually works again. Maintaining vitamin D levels, treating migraine and preventing head injury may help. Be careful with prolonged head-back positions and ensure good hydration, sleep and stress management. Keep a note of which side was affected so that a clinician can treat you quickly.
When to see a doctor
- Spinning triggered by lying down or rolling over, to confirm diagnosis and get treatment.
- Vertigo lasting hours or days, or with hearing loss, tinnitus or ear fullness.
- Dizziness with a severe headache, vomiting, double vision, numbness or weakness.
- Difficulty walking, constant imbalance or repeated falls.
- Dizziness after a head injury.
- Lightheadedness with chest pain, palpitations or fainting.
- Sudden facial droop, arm weakness or slurred speech: call emergency services.
Three common situations
Brief spinning every time you roll to the right in bed: typical BPPV; a repositioning manoeuvre usually cures it.
Constant spinning for two days with nausea after a cold: possible vestibular neuritis; see a doctor.
Dizziness with slurred speech and a drooping face: emergency; call for help.
Key points to remember
Dizziness that appears when you lie down or turn in bed is most often BPPV, a harmless inner-ear condition that responds to repositioning manoeuvres. Move slowly, protect against falls and have the diagnosis confirmed. Seek urgent help for neurological symptoms. Our ENT team can diagnose and treat vertigo.
This guide is for general information and does not replace an examination by your own doctor or ENT specialist.
Questions about being dizzy when lying down
These answers are general information and do not replace an examination or individual medical advice.
Why am I dizzy when I lie down?
Most often BPPV, where inner-ear crystals move into the wrong canal; other causes include inner-ear infection, migraine and low blood pressure.
Is BPPV serious?
No, it is benign, but it can cause falls; treat it and move carefully.
How is it treated?
With the Epley or similar manoeuvre, which works in most people after one to three sessions.
Can I do the Epley manoeuvre at home?
It can be done after instruction, but it works best when the affected ear is correctly identified by a clinician.
How long does BPPV last?
Without treatment it often resolves in weeks to months; manoeuvres usually cure it quickly.
When is dizziness an emergency?
With facial droop, weakness, slurred speech, double vision, severe headache, chest pain or fainting.
Sources
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.