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Head Injury First Aid in Singapore: When to Worry

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Head injury care
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Written & reviewed by the BestDoctors.sg editorial team · Last updated 22 Aug 2026 · General information, not medical advice

Quick answer. Most knocks to the head are minor and can be managed at home with rest, a cloth-wrapped cold pack for short periods, and close observation. The danger is that a serious brain injury can look mild at first and worsen over hours or even days, so the person must be watched by a responsible adult. Call 995 immediately for any red flag: loss of consciousness, repeated vomiting, a worsening or severe headache, a seizure, clear fluid or blood from the nose or ears, unequal pupils, weakness or numbness, slurred speech, confusion or drowsiness, unusual behaviour, or if they cannot be woken. Be extra cautious with babies, the elderly, and anyone on blood-thinning medication.

The reassuring news is that the great majority of head bumps are harmless. The skill in first aid is knowing which ones are not – and watching closely enough, for long enough, to catch a problem that develops after the initial knock.

Step by step

  1. Check safety and whether the person is conscious and responsive.
  2. Call 995 now if they are unconscious, not breathing normally, seizing, have clear or bloody fluid from the nose or ears, or you suspect a neck or spinal injury. Don’t move them unnecessarily; if you must, keep the head, neck and spine aligned.
  3. Stop the activity and rest the person somewhere quiet and calm.
  4. Control any bleeding by pressing a clean cloth gently around (not directly into) the wound; don’t press on a suspected skull fracture or on anything embedded.
  5. Apply a cold pack wrapped in a cloth to the bump for short periods over the first few days to reduce swelling – never put ice directly on skin.
  6. Give paracetamol for a headache if needed. Avoid aspirin or ibuprofen unless a doctor advises, as they can worsen bleeding.
  7. Monitor closely for at least 24 hours – a responsible adult should stay with the person and confirm they can be woken normally, including checking on them overnight if concerned.
  8. Watch for red-flag symptoms (below). If any appear or symptoms worsen, call 995 or go to the nearest A&E.
  9. Avoid driving, alcohol, sedatives and operating machinery for the first 24 hours.

Red flags – call 995 or go to A&E

Seek emergency care straight away for: being knocked out (even briefly); being unable to stay awake or be woken; repeated vomiting; a worsening or severe headache; a seizure; clear fluid or blood from the nose or ears (or bruising behind the ears); unequal pupils; new weakness, numbness, or problems with walking, balance, speech, vision or understanding; confusion or drowsiness; unusual or changed behaviour; any baby under 1 with a bruise, swelling or cut on the head; or any high-impact injury.

Concussion, and who needs extra caution

Concussion (headache, dizziness, nausea, confusion, memory problems, sensitivity to light or noise) can appear or worsen over hours to days, so continue watching even after the first 24 hours and get the person assessed if anything worsens. Have a lower threshold for emergency care if the injured person is a baby or young child, is elderly, is on blood-thinning medication (such as warfarin, a DOAC, or dual antiplatelets), or the impact was high-speed or high-force – in these people, bleeding inside the skull can be more serious and show fewer early signs.

Do and don’t

Do: rest and observe for at least 24 hours; apply a cloth-wrapped cold pack; have an adult confirm the person can be woken; seek care faster for babies, the elderly, those on blood thinners, or after a high-force injury; recognise concussion and have it assessed.

Don’t: move a suspected neck or spinal injury unless the person is in danger; leave the person alone in the first 24 hours; ignore worsening symptoms because they “seemed fine”; give aspirin, ibuprofen or alcohol, or let them drive; or press directly on a suspected skull fracture.

Related first-aid & emergency guides

Related condition guides

Sources

  • SingHealth (Singapore) — Head Injury: symptoms & treatments (warning signs; symptoms can develop over hours to days; first-24-hour restrictions).
  • NHS — Head injury and concussion (red-flag list; home care with rest, cloth-wrapped ice pack and paracetamol; 24-hour supervision; blood-thinner caution).
  • Mayo Clinic / NHS inform — head-trauma first aid (spinal-injury caution; emergency criteria).
  • St John Singapore / Singapore Red Cross — SRFAC-accredited first-aid training.
In an emergency, call 995 (ambulance/fire) in Singapore — or 999 for police. This guide is general first-aid information, not a substitute for certified training or professional medical care. Consider a hands-on first-aid and CPR+AED course accredited by the Singapore Resuscitation and First Aid Council (SRFAC). If you are untrained, a 995 call-taker can coach you through what to do.

Frequently asked questions

My child bumped their head but seems fine — do we need the hospital?

A minor bump with no red flags can usually be watched at home with rest, a cloth-wrapped cold pack and close monitoring for 24 hours. But any loss of consciousness, repeated vomiting, worsening headache, drowsiness, seizure or changed behaviour means call 995 or go to A&E. Have a very low threshold for babies under 1.

Can I let someone sleep after a knock to the head?

Yes, sleep is fine, but a responsible adult should be able to wake them and confirm they rouse normally. If they cannot be woken or are increasingly drowsy, call 995.

How long should I watch someone after a head injury?

Watch closely for at least the first 24 hours, but concussion symptoms can develop or worsen over several days — keep monitoring and seek care if anything worsens.

They are on blood thinners — does that change things?

Yes. People on anticoagulants or antiplatelets, and the elderly, can bleed inside the skull more easily and with fewer early signs. Seek medical assessment early, even after a seemingly minor knock.

When should I NOT move someone after a head injury?

If you suspect a neck or spinal injury — for example after a fall from height or a road accident, or if they have neck pain or numbness. Keep them still with the head and spine aligned and wait for 995 unless they are in immediate danger.