Is dizziness usually serious?

No. Most dizziness is short-lived and harmless, often from standing up too fast, dehydration, anxiety or an inner-ear problem. It becomes serious when it comes with stroke signs, chest pain, palpitations, fainting, or a sudden severe headache.

What is the difference between lightheadedness and vertigo?

Lightheadedness is a faint, floaty, about-to-pass-out feeling, usually linked to blood flow, blood sugar or anxiety. Vertigo is a false sense of spinning or movement, usually from the inner ear or, less often, the brain. They are assessed differently.

Why do I feel dizzy when I stand up?

This is usually orthostatic hypotension, a brief drop in blood pressure on standing. It is common with dehydration, in hot weather, in older adults, and with certain medications. Standing up slowly and staying hydrated helps; see a doctor if it is frequent.

Can dehydration cause dizziness in Singapore's climate?

Yes. The heat and humidity in Singapore make it easy to lose fluids and salt through sweating, which lowers blood pressure and causes lightheadedness. Drinking enough water, especially when active or outdoors, often helps.

When should I go to A&E for dizziness?

Go to A&E or call 995 if dizziness comes with slurred speech, facial droop, one-sided weakness or numbness, a sudden severe headache, chest pain, palpitations, fainting, or if it follows a head injury.

Dizziness & Lightheadedness: Causes & When to See a Doctor

Written & reviewed by the BestDoctors.sg editorial team · Last updated 2 Jul 2026 · General information, not medical advice

Quick answer. Most dizziness in Singapore is harmless and comes from standing up too fast (low blood pressure), inner-ear problems like BPPV, anaemia or low blood sugar, anxiety, or medication side effects. The single biggest red flag is dizziness with slurred speech, facial droop, weakness or a sudden severe headache, which may signal a stroke and needs an immediate call to 995.

Feeling dizzy, woozy, or lightheaded is one of the most common reasons people in Singapore visit a GP or polyclinic. “Dizziness” is a catch-all word: some people mean a faint, floaty, about-to-pass-out feeling, while others mean a sense that the room is spinning. The distinction matters, because the floaty type usually points to blood flow, blood sugar or anxiety, while a true spinning sensation usually points to the inner ear or brain.

This guide focuses on the lightheaded, off-balance type of dizziness. A true spinning sensation (vertigo) is covered in more depth in a separate vertigo guide on this site. Most dizziness settles on its own and is not dangerous, but certain accompanying symptoms in Singapore’s hot, humid climate, where dehydration is common, deserve prompt medical attention. When in doubt, get assessed.

At a glance

Common types of dizziness and what they often suggest
What it feels like	Common causes	What to do
Faint, floaty, about to black out	Low blood pressure, dehydration, anaemia, low blood sugar	Sit or lie down, hydrate, see a GP if recurrent
Worse on standing up quickly	Orthostatic (postural) hypotension, medications	Stand up slowly; review medications with a doctor
Room spinning, triggered by head movement	BPPV and other inner-ear (vestibular) problems	See a GP or ENT specialist
Pounding or skipping heartbeat with dizziness	Cardiac arrhythmia	See a cardiologist; A&E if severe
Dizzy with slurred speech, weakness, numbness	Possible stroke	Call 995 immediately

Red flags: when to seek urgent care

Most dizziness is not an emergency, but call 995 or go straight to A&E if dizziness comes with any of the following, as these can signal a stroke or a serious heart problem:

Sudden slurred speech, facial drooping, or weakness or numbness on one side of the body
A sudden, severe “worst ever” headache
Chest pain, palpitations, or shortness of breath
Fainting or near-fainting, or a fall causing injury
Sudden trouble seeing, walking, or loss of coordination
Dizziness after a head injury

Remember the FAST stroke check: Face drooping, Arm weakness, Speech difficulty, Time to call 995. Even if symptoms pass quickly, get assessed.

Standing up and feeling faint: low blood pressure

If you feel lightheaded mainly when you stand up quickly from sitting or lying down, the likely cause is orthostatic (postural) hypotension, a temporary drop in blood pressure. In Singapore’s heat, dehydration and salt loss from sweating make this more common. It is also more frequent in older adults and in people on blood pressure medications, diuretics (“water pills”) or certain prostate medications.

Stand up slowly and pause before walking
Drink enough water through the day, especially when active or outdoors
Avoid hot showers and prolonged standing if prone to this

If it keeps happening, ask a doctor to review your medications and check your blood pressure lying and standing.

Inner-ear and balance problems

The inner ear (the vestibular system) helps control balance. When it is disturbed, you may feel off-balance or that the room is moving. BPPV (benign paroxysmal positional vertigo) causes brief spinning triggered by head movements, such as rolling over in bed or looking up, and is caused by tiny crystals shifting in the inner ear. Viral inner-ear infections (vestibular neuritis) and Meniere’s disease are other causes.

True spinning vertigo is covered in more detail in a separate guide. If your main symptom is spinning rather than faintness, an ENT specialist can perform specific tests and treatments such as repositioning manoeuvres.

Heart rhythm problems (arrhythmia)

Sometimes dizziness comes from the heart not pumping steadily. An arrhythmia (an abnormally fast, slow, or irregular heartbeat) can reduce blood flow to the brain and cause lightheadedness, especially if paired with palpitations, breathlessness, or near-fainting. This is one of the more important causes to rule out because some arrhythmias are dangerous.

If you notice your heart racing, skipping, or pounding when you feel dizzy, or if you nearly black out, see a cardiologist. Tests such as an ECG or a wearable heart monitor can capture the rhythm during episodes.

Anaemia, low blood sugar, anxiety and medications

Several whole-body causes can leave you feeling lightheaded:

Anaemia: low haemoglobin reduces oxygen delivery, causing tiredness, pallor and dizziness. A simple blood test checks for this.
Low blood sugar (hypoglycaemia): common in people with diabetes on medication, or after long gaps without food. It can cause shakiness, sweating and dizziness.
Anxiety and hyperventilation: panic and over-breathing commonly cause a floaty, lightheaded feeling and tingling.
Medications: blood pressure pills, sedatives, some antidepressants and antihistamines can cause dizziness; do not stop them on your own, but review them with your doctor.

Which specialist should you see?

Start with your GP or polyclinic, who can examine you, check your blood pressure and blood tests, and decide whether a specialist is needed. From there:

If there are neurological features (numbness, weakness, speech changes, balance loss, severe headache) or the cause is unclear, see a neurologist.
If the problem is spinning vertigo, hearing change, or an inner-ear issue, see an ENT specialist.
If dizziness comes with palpitations, chest pain, or near-fainting, see a cardiologist.

Any stroke-like or cardiac red flags mean calling 995 first, not waiting for an appointment.

Related guides

Best Neurology Clinics in Singapore — our editorial shortlist
neurology clinics directory
Fainting
Hand Tremor
Muscle Weakness

Sources

Last updated 23 June 2026. Prices are typical market ranges gathered from the cited sources and vary by clinic, doctor and individual case — they are not quotes. This guide is general information, not medical advice; always consult a qualified, MOH-accredited doctor before any treatment.

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