20 Common Concussion Symptoms in Kids That Parents Often Miss

When parents picture a concussion, they often imagine a child being knocked unconscious, vomiting immediately, or complaining of a severe headache after a hard hit. Those signs can happen, but many concussions are much quieter. A child may walk away from a fall, collision, or blow to the body and seem mostly fine, only to act “off” later that evening or struggle at school the next day.

A concussion is a type of mild traumatic brain injury that can temporarily change how the brain functions. It can result from a bump, blow, or jolt to the head or from a hit to the body that causes the head and brain to move rapidly. Loss of consciousness is not required. Symptoms may appear immediately, but they can also emerge over the following hours or days.

Because concussion symptoms in children can affect physical comfort, thinking, emotions, behavior, vision, and sleep, they are not always recognized as part of the same injury. Younger children may not have the words to describe dizziness, brain fog, or visual strain. Older children and teens may minimize symptoms because they want to return to sports, avoid missing school, or simply do not realize that a new problem is connected to the injury.

20 Concussion Symptoms Parents May Overlook

No single symptom confirms a concussion, and every child’s experience is different. After a possible head injury, watch for changes from your child’s normal behavior and functioning.

1. A child who seems unusually quiet or withdrawn

A normally talkative child may stop joining conversations, spend more time alone, or lose interest in friends and activities. This can be mistaken for embarrassment about the injury or a typical mood, but withdrawal may reflect fatigue, overstimulation, sadness, or difficulty processing what is happening around them.

2. Irritability over small things

A child may become impatient, easily angered, or overwhelmed by situations they usually handle well. Parents sometimes focus on the behavior itself and miss that it began after a hit, fall, or collision.

3. Increased emotional sensitivity

Crying more easily, reacting strongly to disappointment, or seeming unusually emotional can be part of a concussion. These changes are real neurological symptoms, not simply a child being dramatic or difficult.

4. Anxiety or nervousness

A child may suddenly worry more, feel uneasy in busy environments, or become anxious about school, sports, or being injured again. Emotional symptoms can appear alongside physical and cognitive symptoms.

5. Feeling sad or “not like myself”

Some children describe feeling down, flat, or disconnected. A teen may say they simply do not feel right. Mood changes deserve attention, especially if they are persistent, worsening, or accompanied by hopelessness or thoughts of self-harm.

6. Trouble concentrating

A child may reread the same paragraph, lose track of instructions, or struggle to follow a conversation. Concentration problems may first become obvious during homework or in a noisy classroom.

7. Slower thinking or responses

Notice whether your child needs extra time to answer familiar questions, complete routine tasks, or make decisions. They may describe their brain as moving slowly or feeling “foggy.”

8. Forgetfulness

A child may forget an assignment, repeat a question, misplace items, or have trouble recalling what happened before or after the injury. Memory changes can be subtle, especially when family routines compensate for them.

9. A sudden drop in school efficiency

Grades do not always fall immediately. The first sign may be that homework takes twice as long, reading is exhausting, multi-step assignments feel impossible, or the child cannot tolerate a full school day.

10. Sensitivity to light

Sunlight, classroom lighting, phone screens, or headlights may trigger discomfort or worsen a headache. A child may squint, wear a hood indoors, turn down screen brightness, or avoid bright rooms without explaining why.

11. Sensitivity to noise

Cafeterias, music, siblings, sporting events, or ordinary household sounds may suddenly feel painfully loud or overwhelming. This symptom may look like irritability or avoidance.

12. Blurry vision, double vision, or eye strain

Vision changes can make reading, copying from a board, using a computer, or tracking a moving object difficult. A child may rub their eyes, lose their place while reading, close one eye, or complain that schoolwork causes headaches.

13. Balance changes or unusual clumsiness

A child may bump into furniture, stumble on stairs, look less coordinated, or have difficulty with movements that were previously easy. These changes may be subtle enough to be dismissed as carelessness.

14. Dizziness or motion sensitivity

Dizziness does not always mean the room is spinning. A child may feel unsteady, lightheaded, carsick, or uncomfortable when turning their head, walking through a busy hallway, scrolling on a screen, or riding in a vehicle.

15. Nausea without obvious illness

Mild nausea may be blamed on nerves, food, heat, or a stomach bug. When it follows a head or body impact, especially with headache, dizziness, or balance problems, it should be reported to a healthcare professional.

16. Head pressure rather than “pain”

Some children deny having a headache but describe pressure, heaviness, tightness, or a strange feeling in the head. Ask open-ended questions instead of relying only on the word headache.

17. Unusual fatigue or low stamina

A child may tire quickly during school, conversation, reading, or light activity. This is more than ordinary sleepiness; the brain may require additional energy to perform tasks that were previously automatic.

18. Sleeping more than usual

Extra sleep can occur after a concussion. A child may nap unexpectedly, go to bed much earlier, or struggle to stay awake. Sleepiness should be monitored carefully and distinguished from the emergency sign of increasing drowsiness or inability to wake.

19. Sleeping less or struggling to fall asleep

Concussion can also make sleep difficult. A child may feel tired but wired, wake repeatedly, or have trouble settling because of pain, anxiety, or changes in the sleep-wake cycle.

20. Symptoms that return with activity

Your child may feel better while resting, then develop headache, dizziness, fogginess, irritability, or fatigue when they read, use a screen, attend school, exercise, or spend time in a stimulating environment. The return of symptoms is a sign that the current level of activity may be too much.

Concussion Danger Signs: When to Get Emergency Help

Call 911 or go to the nearest emergency department after a bump, blow, or jolt if your child develops any danger sign, including:

• A headache that gets worse and does not go away

• Repeated vomiting

• A seizure or convulsions

• Increasing confusion, agitation, restlessness, or unusual behavior

• Slurred speech, weakness, numbness, or decreased coordination

• One pupil larger than the other or double vision

• Loss of consciousness, increasing drowsiness, inability to wake, or inability to stay awake

• In infants and toddlers, inconsolable crying or refusal to nurse or eat

This list is not a substitute for emergency medical judgment. If you believe your child may have a serious head injury, seek immediate care.

What Parents Should Do After a Possible Concussion

Remove your child from sports and other activities that could lead to another impact. A child with a possible concussion should not return to play on the same day and should be evaluated by a healthcare professional. A second injury before the brain has recovered can be dangerous.

Write down what happened, when symptoms began, and how they change with activity. Inform teachers, coaches, caregivers, and school nurses so they can watch for symptoms and support appropriate adjustments. Many children can begin returning to school within a short period with individualized accommodations; prolonged isolation in a dark room and complete inactivity are no longer considered the standard approach.

Recovery should be gradual and guided by symptoms. Light activity such as short walks may be appropriate when recommended by the child’s clinician, while contact sports, biking, skateboarding, and other activities with a risk of another head injury should wait until medical clearance.

The Connection Between Concussion Recovery and Sleep

Sleep is one of the most important, and sometimes most complicated, parts of concussion recovery. A concussion can cause a child to sleep more, sleep less, have trouble falling asleep, wake frequently, or feel unrefreshed in the morning. Pain, anxiety, changes in routine, reduced daytime activity, and disruption of the brain’s sleep-wake systems may all contribute.

Current guidance allows a child to sleep normally after a concussion when they have been evaluated as appropriate and are not showing danger signs. Parents generally do not need to keep a child awake simply because a concussion is suspected. However, a child who becomes increasingly drowsy, cannot be awakened, or cannot stay awake needs emergency evaluation.

During recovery, support a steady bedtime and wake time, a calm evening routine, and reduced screen exposure before bed. Do not give sleep aids or other medication unless your child’s healthcare provider recommends them. If sleep problems persist, daytime sleepiness becomes severe, or poor sleep appears to be slowing recovery, a clinician experienced in concussion recovery and sleep can evaluate both sides of the problem.

When Symptoms Do Not Go Away

Most children improve, but recovery does not follow the same timeline for everyone. Symptoms that continue beyond two to four weeks, worsen instead of improving, or interfere significantly with school, mood, sleep, balance, vision, or daily functioning deserve specialty evaluation. A history of previous concussion or more severe symptoms early in recovery may increase the likelihood of a longer course.

Parents looking for concussion clinics in Austin or concussion clinics in Houston should seek a team that evaluates the whole child. Persistent symptoms may involve several overlapping systems, and treatment should be tailored to the child’s specific physical, cognitive, emotional, neurological, and sleep-related needs.

Get Answers and a Clearer Path Forward for You're Child's Concussion Recovery

If your child has experienced a head injury and now seems different, trust what you are noticing. A change in sleep, mood, attention, vision, balance, energy, or school performance may be an important clue. Early evaluation can help identify symptoms, rule out urgent concerns, guide safe return to school and activity, and create a recovery plan that fits your child.

Comprehensive Sleep Medicine Associates evaluates children with concussion-related concerns, including persistent symptoms and disruptions involving concussion recovery and sleep. If you are searching for concussion clinics in Austin or concussion clinics in Houston, schedule an appointment with CSMA today online or call 888-503-2762 to request an evaluation for your child.

Frequently Asked Questions About Concussion Symptoms in Children

Can a child have a concussion without losing consciousness?

Yes. Most concussions do not require a loss of consciousness. A child may remain awake and still develop physical, cognitive, emotional, visual, or sleep-related symptoms after a bump, blow, or jolt.

Can concussion symptoms show up the next day?

Yes. Some symptoms appear immediately, while others become noticeable over the next several hours or days, particularly when a child returns to school, reading, screens, exercise, or a busy environment.

Is it safe to let my child sleep after a concussion?

In general, children may sleep normally after a concussion if they are not experiencing danger signs and a healthcare professional has not instructed otherwise. Increasing drowsiness, inability to wake, or inability to stay awake is an emergency warning sign.

How long does concussion recovery take for children?

Recovery varies. Many children improve over days or weeks, but some experience symptoms for longer. Symptoms that persist beyond two to four weeks, worsen, or significantly disrupt daily life should be discussed with a specialist.

When can my child return to sports?

A child should not return to play on the day of a suspected concussion. Return to sports should follow a gradual, stepwise process directed by a qualified healthcare professional. If symptoms return at any stage, the child should stop and contact the treating clinician.

Why can school be difficult after a concussion?

Reading, screens, bright lights, noise, memory demands, and sustained concentration can trigger symptoms. Temporary academic adjustments may help a child return to learning without overwhelming the recovering brain.

When should I schedule an evaluation with CSMA?

Schedule an evaluation when your child develops concussion symptoms after an injury, symptoms are difficult to interpret, sleep becomes disrupted, or recovery is not progressing as expected. Emergency danger signs should be evaluated immediately through 911 or an emergency department.

This article is intended for educational purposes only and should not be considered medical advice or a diagnosis. A suspected concussion or other head injury should be evaluated by a qualified healthcare professional. If your child experiences symptoms following a bump, blow, fall, or jolt to the head or body, contact CSMA or another qualified medical provider for professional evaluation. If your child develops a worsening headache, repeated vomiting, seizure, increasing confusion, slurred speech, weakness, unequal pupils, loss of consciousness, or difficulty waking, call 911 or seek emergency medical care immediately.