Recognising Sudden Dizziness and Vertigo for Student Nurses
Learn how to describe dizziness more clearly, assess its impact, recognise associated neurological and physiological warning signs and understand when sudden symptoms require urgent escalation.
What does the patient mean by “dizzy”?
Patients use the word dizziness to describe different sensations. Clarifying what they are actually experiencing can make the clinical picture much clearer.
“The room is moving”
Vertigo commonly describes an illusion of movement or spinning, either of the patient or their surroundings.
“I feel faint”
The patient may describe feeling as though they could pass out rather than experiencing a spinning sensation.
“I can't balance properly”
Some patients use dizziness to describe instability, disequilibrium or difficulty walking safely.
Establish what changed
Onset
Did the symptoms begin suddenly or gradually? Establish when they started and what the patient was doing at the time.
Duration
Is the sensation continuous, intermittent or already improving?
Triggers
Ask whether symptoms occur with standing, movement or changes in head position.
Associated symptoms
Ask about weakness, speech change, visual symptoms, headache, nausea, vomiting, hearing symptoms, chest pain or palpitations.
Look for associated neurological changes
Sudden dizziness or vertigo becomes more concerning when it occurs with new focal neurological abnormalities or significant difficulty with balance and coordination.
Has speech changed?
Listen for new slurring and consider whether the patient has difficulty producing or understanding language.
Any facial asymmetry?
New facial weakness should be connected immediately with other neurological findings.
Any new limb weakness?
Compare both sides and identify significant new asymmetry.
Any new visual disturbance?
Ask about double vision or sudden visual change and observe eye movement where appropriate.
Has movement become inaccurate?
New ataxia or difficulty coordinating movement may be an important neurological finding.
Any new numbness?
New sensory change should be considered alongside the rest of the neurological presentation.
Sudden dizziness accompanied by new weakness, speech disturbance, visual symptoms, marked ataxia or other focal neurological findings requires prompt clinical assessment.
Dizziness is not always primarily neurological
Many clinical problems can produce dizziness or a feeling of faintness. Avoid focusing on the nervous system while overlooking physiological deterioration.
Has circulation changed?
Hypotension or a change associated with standing may contribute to light-headedness or faintness.
Pulse and symptoms matter
Palpitations, chest symptoms or an abnormal pulse may indicate a cardiovascular component.
Consider metabolic causes
Blood glucose may need assessment when clinically indicated, particularly if other symptoms suggest a metabolic problem.
Consider fluid balance
Reduced intake, vomiting, diarrhoea or fluid loss may contribute to dizziness.
Review the medication picture
Some medicines can contribute to dizziness, postural symptoms or impaired balance.
Look for deterioration
Infection, hypoxia and other acute physiological disturbances may be associated with dizziness or altered function.
Dizziness creates an immediate falls risk
Before establishing the cause, consider whether the patient can safely sit, stand, transfer or walk.
Protect the patient
A patient reporting sudden dizziness should not be encouraged to walk unsupported simply to demonstrate whether they are unsteady.
Notice existing movement
Observe sitting balance, transfers and mobility when it is safe and clinically appropriate.
Use appropriate assistance
Follow local falls-prevention and mobility procedures when the patient's safety is uncertain.
When sudden dizziness needs urgent escalation
- Sudden dizziness with new facial weakness.
- Sudden dizziness with new unilateral limb weakness or numbness.
- New dysarthria, aphasia or other significant communication change.
- New double vision or significant visual disturbance.
- Sudden severe loss of coordination or inability to maintain safe balance.
- Reduced or deteriorating level of consciousness.
- Sudden severe headache with neurological symptoms.
- Significant cardiovascular or physiological deterioration.
- Any rapidly worsening or unexplained neurological presentation.
Assess the acutely unwell patient systematically
Airway
Confirm airway patency and respond immediately if compromise is present.
Breathing
Assess respiratory rate, oxygen saturation, breathing pattern and work of breathing.
Circulation
Assess pulse, blood pressure, perfusion and other relevant circulatory findings.
Disability
Assess consciousness and relevant neurological findings, and consider blood glucose when clinically appropriate.
Exposure
Look for other signs of illness or injury while maintaining patient dignity and safety.
Escalate
Communicate significant new neurological or physiological deterioration promptly.
Sudden vertigo with neurological change
Example
A patient tells you that the room suddenly feels as though it is spinning. They were mobilising normally earlier in the shift.
They now need significant support to remain stable and report new double vision. Their speech also sounds slightly slurred.
You recognise the important pattern: sudden vertigo + major balance change + visual symptoms + speech change.
Rather than assuming this is a simple inner-ear problem, you protect the patient from falling, assess them systematically and escalate the new neurological presentation urgently according to local procedures.
Describe the symptom and associated changes
Example escalation
“I'm concerned about Mr Patel. He developed sudden spinning vertigo approximately 15 minutes ago. He was walking normally earlier but is now unable to stand safely without significant support. He is also reporting new double vision and his speech sounds slurred.”
This communicates the onset, symptom, change from baseline, functional effect and associated neurological findings.
Dizziness assessment errors to avoid
- Assuming “dizzy” automatically means vertigo.
- Failing to ask the patient what the sensation actually feels like.
- Ignoring sudden onset or a major change from baseline.
- Assuming all vertigo is caused by an inner-ear disorder.
- Failing to look for speech, vision, strength, sensation and coordination changes.
- Ignoring blood pressure, pulse, glucose or wider physiological deterioration.
- Encouraging an unstable patient to walk without appropriate support.
- Delaying escalation while trying to identify the precise cause.
Clarify → protect → connect → escalate
What does “dizzy” mean?
Establish the sensation, onset, duration, triggers and change from baseline.
Keep the patient safe
Consider falls risk and connect the symptom with neurological signs, vital observations and the wider clinical picture.
Act on concerning change
Clearly describe what started, when it began and which associated abnormalities are present.
Connect symptoms with the whole neurological picture
Sudden dizziness becomes much easier to reason through when you clarify what the patient means, compare with baseline, protect them from falls and actively look for associated neurological and physiological changes.
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