In this section
Children often bump or bang their heads, and it can be difficult to tell whether an injury is serious or not. Any knock to the head is considered a head injury.
Head injuries are classified as mild, moderate or severe. Many head injuries are mild, and simply result in a small lump or bruise. Mild head injuries can be managed at home, but if your child has received a moderate or severe injury to the head, they need to see a doctor.
Seek help immediately by calling an ambulance if:
Concussion – a mild traumatic brain injury that alters the way the brain functions. Effects of concussion are usually temporary, but can include altered levels of consciousness, headaches, confusion, dizziness, memory loss of events surrounding the injury, and visual disturbance.
Loss of consciousness – when a person is unable to open their eyes, speak or follow commands. They have no awareness of stimulation from outside their body and cannot remember the immediate periods before and after the injury.
The symptoms experienced straight after a head injury are used to determine how serious the injury is. The information below is a guideline.
If your child has a moderate or severe head injury, they may:
You should call an ambulance immediately if your child has a moderate or severe head injury.
A mild head injury or concussion is when your child:
You should seek medical advice if your child has any of the above symptoms of mild head injury, and you are worried about them. Otherwise, continue to observe your child for any of the signs and symptoms listed under care at home.
Children and adolescents with concussion can take up to four weeks to recover, but most concussions will get better on their own over several days. Following a mild head injury, your child will need to get plenty of rest and sleep, particularly in the first 24 to 48 hours.
Your child may have a headache after a head injury. Give them paracetamol (not ibuprofen or aspirin) every six hours if needed to relieve pain.
There is no need to wake your child during the night unless you have been advised to do so by a doctor. Call an ambulance immediately if you have any difficulty waking your child.
Children who have had a head injury may develop symptoms at various times. Some of the symptoms may begin minutes or hours after the initial injury, while others may take days or weeks to show up.
If your child experiences any of the following symptoms, take them to the doctor or nearest hospital emergency department immediately:
If your child has had a head injury, they should return to school and sport gradually. For moderate to severe head injuries, your doctor will advise you. For advice on returning your child to their usual activities if they have had a mild head injury, see our fact sheet
Head injury – return to school and sport.
Cognitive fatigue is a common problem that can happen after a head injury. When a child has cognitive fatigue, it means their brain has to work harder to concentrate on tasks it used to be able to do easily, for example watching TV, playing computer games, or having a long conversation. Cognitive fatigue is not related to a child’s intellectual capacity or physical energy levels. It can lead to behavioural problems, mood swings and educational difficulties.
Your child may experience some or all of the following symptoms of cognitive fatigue:
If your child’s cognitive performance or behaviour is very different to normal, or it is getting worse, take them back to the doctor or your nearest hospital emergency department.
Children experiencing cognitive fatigue should have complete rest – for their brain and body. This means no watching TV or playing on mobile electronic devices. Allow your child to gradually return to reading and other activities that require periods of greater concentration or thinking.
How do I know if my child’s irritability and mood swings are because he is tired after the head injury, or something to worry about?
Children often become fatigued (tired) quickly after a head injury, and this can exaggerate any of the symptoms that may occur after the head injury, such as confusion, emotional disturbances and thinking problems. If you are worried, take them to see a doctor. If your child’s behaviour is very different to their normal behaviour, seek urgent medical assistance.
Developed by The Royal Children's Hospital Emergency, Neurosurgery and Neuropsychology departments. We acknowledge the input of RCH consumers and carers.
Reviewed June 2018
Kids Health Info is supported by The Royal Children’s Hospital Foundation. To donate, visit
This information is intended to support, not replace, discussion with your doctor or healthcare professionals. The authors of these consumer health information handouts have made a considerable effort to ensure the information is accurate, up to date and easy to understand. The Royal Children's Hospital Melbourne accepts no responsibility for any inaccuracies, information perceived as misleading, or the success of any treatment regimen detailed in these handouts. Information contained in the handouts is updated regularly and therefore you should always check you are referring to the most recent version of the handout. The onus is on you, the user, to ensure that you have downloaded the most up-to-date version of a consumer health information handout.