Concussion in Children: Signs, Symptoms, and What Parents Need to Know

Concussion in children and adolescents is not a smaller version of adult concussion. The developing brain responds differently to head injury, recovers on a different timeline, and presents symptoms that can look nothing like the headache-and-dizziness picture most people expect. For parents, coaches, and caregivers, knowing what to look for and what to do next is the most important first step.

Why Concussion Affects Children Differently

The brains of children and adolescents are still developing, which makes them both more vulnerable to the metabolic disruption a concussion causes and slower to recover from it. The neurometabolic cascade triggered by a concussion, an energy crisis in which the brain demands more glucose while simultaneously receiving reduced blood flow, is more pronounced and longer-lasting in younger brains.

According to the CDC's Heads Up program, children and adolescents typically take longer to recover from concussion than adults, often two to four weeks compared to seven to fourteen days for most adults. This extended timeline is not a sign of a more serious injury. It reflects the physiological reality of a brain that is still building its architecture.

The developing brain is also more susceptible to second impact syndrome, a rare but potentially catastrophic condition in which a second concussion occurs before the first has fully resolved. The consequences of second impact syndrome in young people can include rapid cerebral swelling, permanent neurological damage, and in the most severe cases, death. This is the primary reason return-to-play and return-to-learn protocols exist and must be followed.

How Concussion Symptoms Present in Children

Concussion symptoms in children overlap significantly with adult symptoms but include some patterns that are specific to or more prominent in younger age groups. Parents and caregivers often notice behavioral and emotional changes before the child can articulate physical symptoms.

Physical Symptoms

Headache is the most commonly reported symptom across all age groups, but young children may express this as not wanting to be touched on the head, increased crying, or general irritability rather than reporting pain directly. Other physical symptoms include nausea, vomiting, dizziness, balance problems, visual disturbances, and sensitivity to light and noise.

Cognitive Symptoms

Difficulty concentrating, slowed thinking, memory gaps, and confusion are common. In school-age children, these may appear as trouble following directions, forgetting recently learned material, or taking longer than usual to complete familiar tasks. Teachers are often the first to notice cognitive changes in children who return to school before fully recovering.

Emotional and Behavioral Symptoms

Increased irritability, emotional dysregulation, crying more than usual, anxiety, and withdrawal from friends and activities are common in children with concussion. These changes can be mistaken for behavioral problems or stress responses unrelated to the injury, particularly when the original head impact was not witnessed or was considered minor.

Sleep Changes

Children with concussion frequently experience sleep disruption, including sleeping significantly more than usual in the first days after injury, followed by difficulty falling or staying asleep as recovery continues. Changes in nap patterns in younger children and difficulty waking for school in older children are common indicators.

Symptoms Specific to Infants and Toddlers

Very young children cannot report symptoms verbally. Signs of concussion in infants and toddlers include unusual or inconsolable crying, changes in eating or nursing patterns, vomiting, unsteady walking or loss of recently acquired motor skills, excessive sleepiness or difficulty being awakened, and appearing dazed or blank.

Any suspected head injury in an infant or toddler warrants prompt medical evaluation. Young children are not able to communicate symptom changes, which makes caregiver observation and clinical assessment essential.

Signs That Are Commonly Missed

Several concussion presentations in children are frequently overlooked or attributed to other causes.

Delayed symptom onset is one of the most common reasons concussion goes unrecognized in children. Symptoms may not appear until hours after the injury, or may develop gradually over the following day or two. A child who seemed fine immediately after a head impact may begin showing symptoms the next morning at school.

Sub-concussive impacts, hits to the head that do not immediately produce obvious symptoms, can accumulate over a season of contact sports and contribute to cognitive and behavioral changes that are not linked to any single incident. Research from the Boston University CTE Center has documented the neurological effects of repeated head impacts in young athletes even in the absence of diagnosed concussions.

Loss of consciousness is not required for a concussion diagnosis. Fewer than ten percent of concussions involve loss of consciousness, according to the CDC. A child who did not lose consciousness after a head impact may still have sustained a concussion.

When to Seek Emergency Care

Some symptoms following a head injury in a child require emergency evaluation and should not be managed at home or monitored overnight. Seek emergency care immediately for any of the following: a headache that worsens significantly and does not respond to medication, repeated vomiting, seizures, one pupil larger than the other, extreme drowsiness or difficulty being awakened, slurred speech, increasing confusion, weakness or numbness in the extremities, or any loss of consciousness, however brief.

These symptoms may indicate a more serious intracranial injury, including bleeding or swelling, that requires immediate intervention.

What to Do After a Suspected Concussion

Any child suspected of having a concussion should be removed from play or physical activity immediately and evaluated by a medical professional before returning. This applies to recreational play, organized sports, and physical education.

The CDC recommends that children and adolescents with concussion be evaluated by a healthcare provider trained in concussion management. A clinical assessment can confirm the diagnosis, rule out more serious injury, and establish a return-to-learn and return-to-play plan appropriate for the child's age and symptom profile.

Do not give the child aspirin or ibuprofen without medical guidance in the first 24 hours after a head injury, as these medications can increase bleeding risk. Acetaminophen is generally considered appropriate for headache management in the acute period, but confirm with the treating provider.

Return to Learn Before Return to Play

Academic reintegration after concussion requires a structured approach. Cognitive demands, including reading, screen time, homework, and test-taking, can worsen symptoms and prolong recovery when introduced too quickly. Most clinical guidelines recommend a stepwise return-to-learn protocol that begins with complete cognitive rest and gradually reintroduces academic demands as symptoms allow.

Schools are required under many state laws to have concussion protocols in place, and parents have the right to request academic accommodations for a child recovering from concussion. These accommodations may include reduced workload, extended time on assignments, rest breaks during the school day, and temporary exemption from standardized testing.

Return to full physical activity and sports should not begin until the child has successfully returned to full academic participation without symptom exacerbation. The principle is return to learn first, then return to play.

Long-Term Risks of Repeated Concussion in Young Athletes

A single concussion that is properly managed carries a good prognosis for most children. The risk profile changes substantially with repeated injuries. Young athletes in contact sports, including football, hockey, soccer, lacrosse, rugby, and wrestling, are at elevated risk for multiple concussions over the course of their athletic careers.

Research has established an association between repeated head trauma in young people and increased risk of long-term cognitive difficulties, mood disorders, and neurodegenerative disease. The Boston University CTE Center has documented CTE in the postmortem brains of individuals whose repeated head trauma began in youth sports.

This does not mean that all young athletes will develop long-term neurological problems. It means that the number of concussions sustained, the time allowed for recovery between injuries, and the presence of sub-concussive impacts all matter and warrant careful attention from parents, coaches, and clinicians.

For a deeper look at sports-related brain injury and CTE risk, see our article: Why Repeated Hits to the Head Matter, Even Without a Concussion.

For Parents and Caregivers

Your observations are clinically significant. You know your child's baseline behavior, sleep patterns, and cognitive function better than any clinician who sees them for thirty minutes. Documenting what you notice, when symptoms appeared, what activities preceded changes, and how severe symptoms are on a consistent scale, gives the treating provider information they cannot get any other way.

If your child's school, coach, or other adults in their life are minimizing the injury or pressuring a return to activity before the child is ready, you have both the right and the responsibility to advocate for appropriate recovery time. The culture of pushing through in youth sports is a documented contributor to prolonged recovery and repeated injury in young athletes.

If symptoms are not improving after two to three weeks or are significantly affecting school performance and daily life, a referral to a pediatric neurologist or concussion specialist is appropriate.

For more on what happens when concussion is not appropriately managed, see our article: What Happens If a Concussion Goes Untreated.

Related Brain Injury 101 Articles

• Concussion Recovery: What to Expect and What Actually Helps
• Post-Concussion Syndrome: What It Is, Why Symptoms Persist, and What Families Need to Know
• What Happens If a Concussion Goes Untreated
• How Long Does Post-Concussion Syndrome Last?
• Why Repeated Hits to the Head Matter, Even Without a Concussion

Frequently Asked Questions

How do I know if my child has a concussion?

Signs include headache, nausea, dizziness, confusion, increased irritability, emotional changes, sleep disruption, and difficulty concentrating. Young children may show changes in eating, sleeping, or behavior rather than reporting symptoms directly. Any suspected concussion warrants evaluation by a medical professional.

How long does concussion recovery take in children?

Most children and adolescents recover within two to four weeks. Recovery time varies based on age, injury history, and individual factors. Children generally take longer to recover than adults due to the vulnerability of the developing brain.

When can my child return to sports after a concussion?

Return to full physical activity should follow a stepwise protocol guided by a medical professional. The child should return to full academic participation without symptom exacerbation before beginning physical return-to-play steps. No child should return to contact sports on the same day as a suspected concussion.

Should I keep my child awake after a concussion?

Current medical guidelines do not recommend keeping a child awake after a concussion. Sleep is important for recovery. However, if the child is difficult to awaken, is excessively drowsy beyond normal sleep, or shows other concerning symptoms, seek emergency evaluation.

Can a child get post-concussion syndrome?

Yes. Children and adolescents can develop post-concussion syndrome, and their recovery timelines can be longer than adults. Academic accommodations and careful management of cognitive and physical demands are particularly important for young people with persistent symptoms.