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pediatric-illness

Head Bumps and Concussion Signs in Children

Most childhood head bumps are minor. Watch for vomiting, won't wake, unequal pupils, or a seizure — those mean the ER right away.

Why head injuries need a watching period

The skull and brain are well protected, and many everyday tumbles — off a couch, down a step, or into a door frame — don't cause serious injury. The concern with any significant head impact is that a small number of children develop bleeding inside the skull that can build slowly over minutes to hours. That's why clinical guidance recommends a calm but attentive observation period even when a child seems fine right away 1.

A goose-egg (bump under the scalp) is caused by blood pooling between the skull and skin — it looks alarming but generally signals the force was absorbed by the scalp rather than transmitted deeply. Concussion — a functional disturbance of the brain without visible structural damage — is the most common significant head injury in children, and it can happen without loss of consciousness and without any visible lump or cut.

What concussion can look like in children

Concussion symptoms in children often differ from adult descriptions. Parents may notice 12:

  • Confusion or dazed appearance — the child seems "not themselves," stares blankly, or asks the same question repeatedly
  • Headache — younger children may hold their head, become irritable, or refuse to play
  • Vomiting — one episode shortly after impact can happen in younger children even with minor injury, but repeated vomiting is more concerning
  • Sensitivity to light or noise — the child wants a dark, quiet room
  • Balance problems or clumsiness — unsteady walking after an age when walking is well established
  • Sleep changes — sleeping more than usual or difficulty waking
  • Mood or behavior changes — more emotional, irritable, or easily upset than usual

Symptoms sometimes appear hours after the injury, which is why continued monitoring matters even when a child seems fine immediately after impact.

The difference between a minor bump and a serious injury

Some features at the time of injury increase the probability that something more serious is happening 2:

  • The mechanism matters — a fall from standing height onto carpet carries much lower risk than a fall from a height greater than the child's own height, a motor vehicle accident, or an impact with a hard object
  • Loss of consciousness — even brief, is meaningful; a child who was "knocked out" even for seconds warrants same-day evaluation
  • Infants — have proportionally larger, heavier heads and weaker necks, making them more vulnerable; any significant head injury in an infant warrants prompt evaluation
  • Repeated impacts — a child who has had a prior concussion may be more susceptible to injury

For most falls from low height in children over 2 years old who cry immediately (crying signals the brain responded normally), who have no loss of consciousness, and who return to usual behavior within minutes, careful home observation is reasonable — though a call to the child's doctor is always appropriate.

What to do at home during the observation period

In the hours after a head bump 1:

  • Keep the child calm and with you; avoid strenuous activity
  • It is generally safe to let a child sleep — the old advice to keep children awake after a head injury has been updated by clinical guidance; sleep is not dangerous, but it should be possible to wake the child and get a response
  • Gently rouse the child once or twice during the first night to confirm they respond normally
  • Avoid screens (phones, tablets, TV) if concussion is suspected — cognitive and visual stimulation may slow recovery
  • For head-injury headache, acetaminophen is generally acceptable for pain; avoid ibuprofen or aspirin without first checking with a doctor

Concussion recovery in children generally requires a gradual return to activity guided by a healthcare provider, as returning to sports or demanding school activities too soon can prolong symptoms.

When to go to the emergency room immediately

Some signs after a head injury mean calling 911 or going to the emergency room without waiting 12:

  • The child will not wake up or is very difficult to rouse
  • Seizure after the injury
  • Repeated vomiting (more than once or twice, or vomiting that continues)
  • One pupil larger than the other, or pupils that do not react normally to light
  • Weakness, numbness, or clumsiness in arms or legs that is new
  • Slurred speech or the child is speaking in a way that is not normal for them
  • The child is under 1 year old and had any significant impact
  • The child lost consciousness, even briefly
  • Clear fluid from the nose or ears after the injury
  • The child's condition is worsening rather than improving over time

When in doubt, calling a nurse line or going in for evaluation is never the wrong choice.

Common questions

Is it okay to let my child sleep after hitting their head?

In most cases, yes — the prior advice to keep children awake has been updated by current clinical guidance. It is generally safe to let a child sleep, but parents are often advised to gently rouse the child once or twice in the first night after a significant impact to confirm the child responds normally. If the child cannot be roused or seems unusually difficult to wake, that warrants emergency care.

My toddler hit their head and cried right away. Does that mean they're okay?

Crying immediately after a head impact is generally a reassuring sign — it indicates the brain responded normally. That said, it doesn't rule out a concussion on its own. Continued observation for the warning signs described above is still recommended, and a call to the child's doctor is always appropriate after a significant head impact.

How long do concussion symptoms last in children?

Most concussion symptoms in children improve within one to four weeks, though recovery varies. Some children — particularly adolescents — experience symptoms that persist longer. A healthcare provider can guide a gradual return to school and physical activity in a way that supports recovery.

My child has a large goose-egg. Does that mean they need a CT scan?

Not automatically. A scalp hematoma (goose-egg) is common after head impacts and usually resolves on its own. Whether imaging is needed depends on the overall picture — the child's age, how the injury happened, any symptoms present, and how the child is acting. A doctor can assess whether imaging is appropriate.

When to get care right away

  • —Child cannot be woken or is extremely difficult to rouse
  • —Seizure after the head injury
  • —Vomiting more than once or twice, or vomiting that continues
  • —One pupil larger than the other
  • —New weakness, numbness, or loss of coordination in arms or legs
  • —Slurred or abnormal speech
  • —Loss of consciousness, even briefly
  • —Any significant head injury in an infant under 1 year
  • —Clear fluid leaking from nose or ears
  • —Symptoms that are worsening rather than improving

Call 911 or go to the nearest emergency room immediately if any of the above signs are present.

This article is general health information for parents and is not a diagnosis or treatment plan for any individual child. Always contact your child's healthcare provider with concerns after a head injury.

References

  1. 1.Centers for Disease Control and Prevention (2024). Concussion Basics | HEADS UP. CDC HEADS UP Program. link ✓Definition of concussion, recovery timeline of 2–4 weeks, and importance of medical evaluation and avoiding repeat injury
  2. 2.Centers for Disease Control and Prevention (2024). Signs and Symptoms of Concussion | HEADS UP. CDC HEADS UP Program. link ✓Observable concussion signs in children including confusion, vomiting, balance problems, and emergency danger signs requiring 911
  3. 3.Centers for Disease Control and Prevention (2024). What to do After a Concussion | HEADS UP. CDC HEADS UP Program. link ✓Post-concussion home care guidance, gradual return-to-activity protocol, and monitoring recommendations

3 sources, numbered by first appearance. General health information, not medical advice — synthetic demonstration content.