Quick answer. Most persistent headaches are tension-type or migraine and are not dangerous, but a sudden severe headache, or one with fever, stiff neck, confusion, weakness or vision loss needs emergency care. In Singapore, call 995 for these warning signs.
Headaches are extremely common, and the large majority are tension-type headaches or migraines that, while uncomfortable, are not life-threatening. A headache becomes worth investigating when it is new, persistent, changing in pattern, or comes with other neurological symptoms.
This guide explains common versus serious causes, the red flags that mean you should not wait, and which specialist to see if headaches keep coming back.
At a glance
| Cause | What it suggests | What to do |
|---|---|---|
| Tension-type headache | Tight, band-like pressure on both sides; stress, poor posture or screen time | Rest, hydration, simple pain relief; review with a GP if frequent |
| Migraine | Throbbing pain, often one-sided, with nausea or light/sound sensitivity | Identify triggers; see a GP or neurologist for a management plan |
| Medication-overuse headache | Daily or near-daily headache in someone using painkillers frequently | Speak to a doctor before stopping; do not self-manage abruptly |
| Sinus or eye-related headache | Facial pressure with congestion, or strain after prolonged near work | Treat the underlying cause; have vision checked if relevant |
| Secondary headache (serious) | New, sudden, or worsening headache with other symptoms | Seek urgent medical assessment; call 995 if red flags are present |
What is a persistent headache?
A persistent headache is one that lasts for hours to days, keeps recurring, or does not fully settle with usual measures. Most fall into two groups. Tension-type headaches feel like a tight band or pressure around the head and are often linked to stress, fatigue, poor posture or long hours at a screen. Migraines are typically throbbing, frequently one-sided, and may come with nausea, vomiting, or sensitivity to light and sound; some people experience an aura such as visual zig-zags beforehand.
These are called primary headaches because the headache itself is the condition. They can be disabling but are not usually dangerous. The key is to track how often they happen and what triggers them.
Common causes versus serious causes
Common, generally benign causes include tension, migraine, dehydration, skipped meals, caffeine withdrawal, poor sleep, eye strain and sinus congestion. Frequent use of painkillers can paradoxically cause a daily medication-overuse headache.
Less commonly, a headache is a sign of a more serious underlying problem (a secondary headache). Examples include raised blood pressure, infections such as meningitis, bleeding within or around the brain, or, rarely, a tumour. What makes these concerning is usually the company the headache keeps: fever, neurological changes, or a sudden severe onset. The pattern matters more than the pain alone.
Red flags: when to seek urgent or emergency care
Call 995 immediately or go to the nearest Accident & Emergency department if you have:
- A sudden, severe “thunderclap” headache that reaches maximum intensity within seconds to minutes, or the worst headache of your life
- Headache with fever and a stiff neck, or with a rash
- Headache with weakness or numbness, difficulty speaking, confusion, drowsiness, seizures, or loss of vision
- Headache after a significant head injury
Arrange a prompt (non-emergency) medical review if a headache is new and persistent in someone over 50, steadily worsening over days to weeks, consistently worse in the morning or with coughing, straining or lying down, or if your usual headache pattern has clearly changed. When in doubt, seek care.
How headaches are assessed and managed
A doctor will ask about the pattern, triggers, timing and associated symptoms, and perform an examination that may include checking your blood pressure and a basic neurological assessment. A headache diary noting frequency, duration, possible triggers and medication use is very helpful.
Most primary headaches are diagnosed clinically without scans. Imaging such as a CT or MRI is reserved for cases with red flags or an unusual pattern. Management ranges from lifestyle adjustments (sleep, hydration, stress and posture) to acute pain relief and, for frequent migraines, preventive treatment guided by a doctor.
Which specialist should you see?
For occasional headaches, a GP is the right first stop and can manage most cases or refer you on. Consider seeing one of Singapore’s neurologists if your headaches are frequent or severe, are not responding to standard treatment, have changed in pattern, or are accompanied by neurological symptoms such as visual disturbance, weakness or numbness. A neurologist can confirm the diagnosis, exclude secondary causes, and tailor a prevention plan. Remember that any red-flag features call for emergency care first.
How to prepare for your appointment
The single most useful thing you can bring is a headache diary kept over two to four weeks. For each headache, jot down the date and time it started, how long it lasted, where the pain was and what it felt like, anything that seemed to trigger it (poor sleep, skipped meals, stress, alcohol, screen time, menstrual cycle), and every painkiller you took, including the dose and how often. This record helps your doctor tell tension-type headache from migraine, spot a medication-overuse pattern, and judge whether anything has genuinely changed. Also note any other symptoms such as visual disturbance, nausea or neck stiffness, and write down the medicines and supplements you take regularly.
Self-management at home
For ordinary tension-type headaches and migraines, simple measures often help. Keep regular sleep and meal times, stay well hydrated, take screen breaks and check your seating posture, and build in ways to wind down from stress. Used occasionally, simple pain relief such as paracetamol can ease symptoms, but taking painkillers on most days can lead to a daily medication-overuse headache, so try to limit them and speak to a doctor before stopping abruptly. Identify and reduce your own triggers where you can, and seek a review rather than steadily increasing painkillers if headaches are becoming more frequent.
Common questions
Do I need a brain scan for my headaches?
Usually not. Most tension headaches and migraines are diagnosed from your history and examination. Scans such as CT or MRI are reserved for red-flag features or an unusual, changing pattern, and your doctor will advise if one is needed.
Can stress and screen time really cause headaches?
Yes. Stress, fatigue, poor posture and long hours at a screen are among the commonest triggers for tension-type headaches, which is why lifestyle adjustments form part of treatment.
Related guides
- Best Neurology Clinics in Singapore — our editorial shortlist
- neurology clinics directory
- Symptom guide
- Symptom guide
- Symptom guide
Sources
- HealthHub (Singapore) – Headache
- MOH Singapore – Health conditions and resources
- NHS – Headaches
- NHS – Migraine
- Mayo Clinic – Headache
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