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Concussion

A concussion is a real injury, and most people heal well. Here’s what to expect, step by step, and how to look after your mind while your brain recovers.

⏱ 6 min read📑 11 sections📚 12 sources✅ Reviewed October 2026

By the numbers

How common concussion is, and how long recovery usually takes.

Teens

15%of U.S. high school students said they had at least one concussion from sports or physical activity in the past year (CDC, 2017 survey).
2.5 millionhigh school students is the CDC’s estimate of how many that 15% represents.
17% vs 13%Boys reported a sports concussion a little more often than girls in that survey (CDC).

Recovery

2 to 4 weeksis how long most children take to feel better after a concussion. Some have symptoms for months or longer (CDC).
1 to 2 daysMost children can go back to school within 1 to 2 days of a concussion, with supports (CDC).
A week or moreis how long the step-by-step return to sports can take, with a clinical provider’s OK (CDC).

Mental health

1 in 5adults seen in the emergency room for a mild brain injury had signs of PTSD or depression 3 to 6 months later (TRACK-TBI study, 2019).
20% vs 9%At 3 months, these mental health symptoms were more than twice as common after a mild brain injury as after an injury that didn’t involve the head (TRACK-TBI).

What is a concussion?

A mild brain injury from a bump, blow or jolt. Mild in name, real in how it feels.

A concussion is a type of traumatic brain injury. It happens when a bump, blow or jolt to the head, or a hit to the body, makes the head and brain move quickly back and forth. That fast movement can stretch brain cells and cause chemical changes in the brain.

You don’t have to be knocked out to have a concussion. And a brain scan is usually not needed, because most concussions don’t show up on one. A clinical provider decides based on what happened and how you’re feeling.

🔎 Hard to see from the outsidePeople may not notice, or may not admit, that something is wrong.
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Concussion is sometimes called an “invisible injury.” There’s often no cast, no bandage and nothing on a scan. A person may not realize or admit they are having problems, and family or even health providers can overlook them.

If you feel “off” after a hit to the head, that’s enough reason to get checked. You don’t need to prove it to anyone.
⏰ Symptoms can show up laterSome signs appear right away. Others take hours or days.
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Symptoms are usually strongest in the first 1 to 2 days. But some may not appear for hours or days, and they can change during recovery. That’s why it helps to keep watching for a few days after any hit.

🔁 Why a second hit mattersA healing brain is more easily hurt again.
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While the brain heals, it is more vulnerable to another injury. Repeated concussions, especially without enough healing time between them, raise the risk of longer and more serious symptoms.

Experts think one or two concussions don’t lead to long-term brain conditions. Healing fully before taking more risks is what matters most.

For the bigger picture on all brain injuries, see the overview guide “Brain injury & concussion.” For more serious injuries, see “Traumatic brain injury (TBI).”

Signs at every age

Babies, kids, teens and adults can show a concussion in different ways.

A concussion can affect how someone thinks, learns, feels, acts and sleeps. Young children and people with disabilities may not be able to say how they feel, so the people who know them best are often the first to notice changes.

🍼 Babies, toddlers and preschoolersAges 0 to 4: watch for changes in crying, eating, sleep and play.
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Changes caregivers may notice

  • Crying more or being more irritable
  • Less interest in play
  • Looking dazed or unsteady
  • Needing more comfort or to be held
  • Refusing to nurse or eat
  • Sleep changes
  • Slower speech, or needing more help than usual
  • Throwing up right after the injury with no other cause
Go to the emergency room right away if a baby or toddler won’t stop crying and can’t be comforted, or won’t nurse or eat after a hit to the head.
🎒 School-age kids and teensAges 5 to 17: looking dazed, slower answers, clumsiness, mood changes.
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Changes adults may notice

  • Clumsiness or being unsteady
  • Looking dazed or confused
  • Mood or personality changes
  • Slower answers and reactions
  • Sudden trouble remembering or focusing
  • Throwing up right after the injury with no other cause

Kids may describe it in their own words: “My head feels funny,” “I feel weird,” or “Everything is too loud.” Take those words seriously.

🧑 What people feel insideHeadaches, fogginess, feeling more emotional, and sleep changes.
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Body

  • Bothered by light or noise
  • Dizziness or balance problems
  • Feeling tired, with no energy
  • Headaches
  • Upset stomach or throwing up (early on)
  • Vision problems

Thinking, feelings and sleep

  • Anxiety, sadness or irritability
  • Feeling foggy or slowed down
  • Feeling more emotional
  • Memory or focus problems
  • Sleeping more, less, or having trouble falling asleep
👵 Older adultsFalls are the most common cause, and a concussion can be missed.
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Falls and car crashes cause most brain injury hospital stays in older adults. Most of these injuries are mild, but older adults are more likely to need hospital care after one.

A concussion can be missed in later life because its signs, like memory trouble or mood changes, can look like other conditions such as dementia. That’s why it’s wise to get checked after any fall or crash, even if you feel fine.

Ask your clinical provider about anything you take every day and whether it changes your risk after a head injury.
Call 911 or go to the emergency room right away after a head injury if someone has: a headache that keeps getting worse; seizures; repeated vomiting; slurred speech, weakness, numbness or poor coordination; one pupil bigger than the other, or double vision; growing confusion or unusual behavior; not recognizing people or places; or is very drowsy, passes out, or is hard to wake.
Noticing some of these signs doesn’t mean you or your child has a concussion. Only a qualified professional can assess what’s going on. Please talk to your clinical provider.

The first hour, day and week

What to do right after the injury, and how to rest without shutting down.

The early days set the tone for recovery. The goal is a little rest, then a gentle return to normal life. Hiding in a dark room all day isn’t recommended, and neither is pushing straight back in.

1️⃣ The first hourWatch for danger signs. If none, keep watching for concussion signs.
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Right after a bump, blow or jolt

  1. Stop the activity. No more play that day
  2. Check for danger signs. If you see any, call 911 or go to the emergency room
  3. If there are none, keep an eye out for concussion signs over the next hours and days
  4. Write down how it happened and how they seemed afterward
🩺 The first 1 to 2 daysGet checked by a clinical provider, and take it a bit easy.
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Anyone with a possible concussion should see a clinical provider. Tell them how the injury happened, whether the person passed out or lost memory, and about any past concussions. Most children don’t need a brain scan.

Gentle ways to rest

  • Allow rest when needed, but not all day in a dark room
  • Cut back on screens and on hard mental or physical work
  • Keep the usual bedtime, and let them sleep as normal
  • Take short walks if symptoms allow
Once a clinical provider has checked them, there’s no need to keep someone awake. Sleep helps the brain heal.
📅 The first week or twoSlowly add back school, work and light activity.
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After a couple of days, most people do best by slowly adding activities back over about a week. If symptoms get worse or new ones appear, that’s a signal to ease off for a bit, not a failure.

Do

  • Add one activity at a time
  • Keep in touch with friends and family
  • Share what happened with teachers, coaches or a manager
  • Watch for new or worsening symptoms

Avoid

  • Anything that risks another hit, like contact sports, biking or skateboarding, until a provider says OK
  • Keeping someone on the couch or in bed all day
  • Rushing recovery or expecting a set timeline
Use the “My concussion recovery timeline” worksheet to note what happened and how things change day by day.

How long recovery takes

Most people feel better in weeks. Here’s what can slow it down, and what helps.

For most people, concussion symptoms fade within days to a few months. Most children feel better within 2 to 4 weeks. “Better” means doing all your usual activities without symptoms.

Recovery is rarely a straight line. Good days and harder days are normal. Comparing yourself to a teammate or friend doesn’t help, because every brain heals at its own pace.

🐢 What can slow recoveryPast concussions, strong early symptoms, poor sleep and stress.
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Things linked to a longer recovery

  • A past concussion
  • Family or social stress
  • Learning difficulties, migraines, or a mental health condition before the injury
  • More severe symptoms right after the injury
  • Sleep problems

Adults over 40 may also need a little more time to recover.

⏳ When symptoms last longerSome people still have symptoms after a month. Help is available.
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A small number of people take longer to recover and may need more specific care. If symptoms last beyond 2 to 4 weeks, a clinical provider may suggest a specialist in brain injury.

Stress, worry and pain can cause symptoms that feel a lot like concussion. That doesn’t mean it’s “all in your head.” It means caring for your mood and stress is part of healing.

🌱 What helps healingPacing, sleep, light movement and staying connected.
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Everyday helpers

  • A steady bedtime and wake time
  • Breaks before you need them
  • Light movement, like short walks, as allowed
  • Support from family, friends and peer groups
  • Talking about worries instead of carrying them alone
Symptoms during recovery are usually part of healing, not a sign of lasting damage.

Back to school with a plan

Building a school team, short-term supports, and when a 504 Plan or IEP may help.

Going back to school soon, with the right supports, is part of recovery. Waiting too long can make recovery longer. Most students only need short-term changes that fade as they feel better.

Steps the CDC suggests

  1. Ask the clinical provider to fill out the CDC HEADS UP Letter to Schools
  2. Share it with teachers, the school nurse and other staff
  3. Set up a concussion plan and a small school team, with one main contact person
  4. Match supports to the student’s symptoms
  5. Support their feelings and check progress, then remove supports step by step
🧩 Supports for thinking and memoryLess work, more time, and help with notes.
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  • Class notes, or permission to record lessons
  • Extra time for work and tests
  • Fewer assignments, focused on key tasks
  • Fewer tests in one day, or study guides
🔅 Supports for body and sleepBreaks, quiet places and less glare.
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  • A quiet place for work, tests or lunch
  • Extra time between classes to avoid crowds
  • Rest breaks and visits to the school nurse
  • Sunglasses, or a seat away from bright light
💛 Supports for feelingsA trusted adult, a calm space, and staying close to friends.
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Students can feel frustrated, left out or behind. An emotional support plan with a trusted adult, a quiet place to go, and encouragement to stay connected with friends can make a big difference.

Watch for

  • Feeling helpless or hopeless
  • Less interest in usual activities
  • Pulling away from friends
  • Trouble controlling emotions or managing stress
📄 If problems last: 504 Plans and IEPsPublic schools must support students whose brain injury affects learning.
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Under the Americans with Disabilities Act, public schools must provide supports for students with short- or long-term disabilities from a brain injury that affects their schoolwork. Options can include a 504 Plan or an Individualized Education Plan (IEP). What’s offered varies by state and district.

Ask the school counselor or case manager what’s possible, and bring the provider’s letter.
The “Our back-to-school concussion plan” worksheet helps families and schools agree on supports.

Adults: work, home and daily life

Concussions aren’t just for athletes. Easing back into work and life as a grown-up.

Many adult concussions come from falls, car crashes and everyday accidents. Adults often feel pressure to “push through” for work or family. But pacing yourself now usually means a smoother recovery later.

🖥️ Easing back into workSome people need short-term changes for days or a few weeks.
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It’s normal to have some trouble at work at first, and that can feel stressful. A small number of people need specific workplace supports for days or a few weeks.

Ideas to ask about

  • Doing one task at a time
  • Fewer meetings or screen-heavy tasks for a while
  • Regular short breaks in a quiet spot
  • Shorter days at first

The “Work & mental health” guide has tips for talking with a manager about what you need.

🚗 Driving and risky tasksAsk your provider before driving or doing anything that risks another hit.
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Slower reactions and trouble focusing can make driving, ladders or power tools less safe for a while. Ask your clinical provider when it’s safe to drive and return to physical activities.

🏠 Parenting and home lifeLower the bar for a little while, and ask for help.
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Noise, busy mornings and screens can wear out a healing brain. It’s OK to let some chores wait, accept meals or rides, and tell family what helps.

Simple supports

  • A short rest after busy times
  • Lists and phone reminders
  • Quieter evenings for a while
  • Sharing jobs with a partner, friend or family member

Sports concussion and speaking up

Why athletes hide symptoms, the CDC HEADS UP rules, and the feelings of being sidelined.

The CDC’s HEADS UP program helps coaches, parents and athletes spot concussion and respond safely. Its core rule is simple: if a concussion might have happened, take the athlete out, and only a clinical provider decides when it’s safe to return.

📣 Why speaking up is hardAthletes often keep playing to avoid letting the team down.
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In a survey of nearly 800 former college athletes, about 1 in 3 of those who had a concussion didn’t tell anyone about at least one. The top reasons were not wanting to leave the game, not wanting to let the team down, and not knowing it was a concussion.

Athletes who return too soon are more likely to get another concussion while the brain is still healing.

Telling a coach or parent you feel “off” is a strong, team-first choice. It protects your season and your future.
🛑 The HEADS UP responseRemove, check, keep out, and let a provider decide.
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  1. Remove the athlete from play right away
  2. Check for danger signs, and go to the emergency room if any appear
  3. Keep them out for the rest of the day, and until a clinical provider clears them
  4. Don’t try to judge how serious it is yourself

The overview guide “Brain injury & concussion” explains the six-step return to sports in detail.

🪑 Feelings of being sidelinedMissing your sport can bring sadness, frustration and loneliness.
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Frustration, sadness, anger and feeling isolated are common during concussion recovery. For athletes, losing practice, games and teammates can hit hard, especially if sport is a big part of who they are.

Ways to stay connected

  • Go to practice or games to watch, if symptoms allow
  • Keep a small role: stats, team chats, cheering
  • Spend time on other things you enjoy
  • Talk with someone if sadness or worry hangs around
🧑‍🏫 For coaches and parentsMake it safe to report, and model calm care.
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  • Help players learn what a concussion feels like, since many don’t recognize one
  • Know the HEADS UP steps and your team’s plan
  • Never pressure an athlete to play through it
  • Praise players who speak up

The CDC offers free HEADS UP training for coaches, parents and school staff.

Your mind after a concussion

Worry, low mood and stress symptoms are common, and they can be helped.

A concussion can affect mood as well as the body. A large U.S. study followed adults treated in the emergency room for a mild brain injury. About 1 in 5 had signs of PTSD or depression 3 to 6 months later, more than people with other injuries.

How hard the hit was, or whether someone passed out, didn’t predict these feelings. Having had mental health struggles before, or being hurt in an assault or violence, raised the chances. That’s why follow-up care matters, even after a “mild” injury.

😟 Worry and feeling on edgeFear of getting hurt again, or worry about school, work or sport.
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Anxiety and nervousness are common concussion symptoms. Worrying about recovery can also make headaches and poor sleep worse, which can feel like a loop.

What can help

  • Slow breathing for a few minutes
  • Focusing on what you can do today
  • Getting clear information from your provider
  • Telling someone what you’re worried about
🌧️ Low moodSadness or feeling flat that lasts more than a couple of weeks.
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Sadness is a listed concussion symptom. If low mood, hopelessness or losing interest in things lasts or gets worse, talk with a clinical provider. Depression is treatable.

See “Depression: understanding it” for more.

⚡ After a frightening eventCrashes, falls and assaults can leave stress reactions too.
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If the concussion happened in a scary or violent event, nightmares, jumpiness or avoiding reminders can follow. These are stress reactions, and they deserve care just as much as the headache does.

The “PTSD” guide explains these reactions and what helps.

If you or your child feel hopeless or think about suicide, call or text 988 (U.S.), or text HOME to 741741. If a life is in danger, call 911.

Supporting someone with a concussion

How parents, partners, friends and teammates can help.

Because a concussion is hard to see, people can feel misunderstood. Believing them, being patient, and helping with small things goes a long way.

Ways to help

  • Check in about mood, not just headaches
  • Help keep a steady sleep routine
  • Keep them connected with friends and family
  • Let them rest without guilt, and cheer small steps
  • Share what happened with teachers, coaches or caregivers
  • Watch for new, worse or lasting symptoms
👨‍👩‍👧 For parentsYou know your child’s normal best. Trust what you notice.
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Watch for changes from your child’s usual self and tell their provider if symptoms get worse. Siblings, teachers and babysitters can help if they know what happened.

🫂 For friends and teammatesInclude them, even if they can’t play or party for a while.
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  • Invite them to quiet hangouts
  • Don’t joke about them “faking it”
  • Speak up if a teammate seems off after a hit

When and where to get help

Emergency signs, when to call your provider, and helpful lines.

Call 911 or go to the emergency room if, after a head injury, someone has

  • A headache that keeps getting worse
  • Growing confusion, restlessness or unusual behavior
  • Not recognizing people or places
  • One pupil larger than the other, or double vision
  • Passing out, growing drowsiness, or trouble waking up
  • Repeated vomiting
  • Seizures
  • Slurred speech, weakness, numbness or poor coordination

Contact your clinical provider if

  • Anxiety, sadness or hopelessness appears or gets worse
  • Symptoms come back when returning to activities
  • Symptoms last beyond 2 to 4 weeks, or aren’t improving
  • You had a hit to the head and still don’t feel right
In a crisis, call or text 988 (U.S.), or text HOME to 741741. If a life is in danger, call 911. For brain injury information and local services, call the Brain Injury Association of America at 1-800-444-6443 (weekdays; not a crisis line). Outside the U.S., find support lines at findahelpline.com.

📝 Worksheets for this guide

Fill these in privately in the app. Your answers stay on your phone.

My concussion recovery timelineWrite down what happened and track how things change, to share with your clinical provider.
Our back-to-school concussion planAgree with the school on who helps, which supports to use, and how to step them down.
My mood check after a concussionA short weekly check on feelings, so worry or low mood doesn’t go unnoticed.
🔒 Fill in privately in the Mentally United Wellness App. Free, no ads, no accounts.

Sources

  1. Centers for Disease Control and Prevention (CDC) (2025). HEADS UP: Concussion Basics
  2. Centers for Disease Control and Prevention (CDC). HEADS UP: Signs and Symptoms of Concussion
  3. Centers for Disease Control and Prevention (CDC). HEADS UP: Recovery From Concussion
  4. Centers for Disease Control and Prevention (CDC). HEADS UP: Returning to School After a Concussion
  5. Centers for Disease Control and Prevention (CDC). HEADS UP: How to Respond to a Possible Concussion
  6. CDC Stacks (Centers for Disease Control and Prevention) (2016). Motivations Associated With Nondisclosure of Self-Reported Concussions in Former Collegiate Athletes (Kerr ZY, et al., American Journal of Sports Medicine)
  7. Centers for Disease Control and Prevention (CDC). Signs and Symptoms of Mild TBI and Concussion
  8. Centers for Disease Control and Prevention (CDC). Still Going Strong: Information for Older Adults
  9. Centers for Disease Control and Prevention (CDC) (2018). Self-Reported Concussions from Playing a Sport or Being Physically Active Among High School Students, United States, 2017 (MMWR)
  10. Model Systems Knowledge Translation Center (MSKTC), NIDILRR-funded. Concussion Recovery
  11. Model Systems Knowledge Translation Center (MSKTC), NIDILRR-funded. Understanding TBI: What Happens During Injury and in Early Stages of Recovery
  12. JAMA Psychiatry (via PubMed Central, NIH) (2019). Risk of Posttraumatic Stress Disorder and Major Depression in Civilian Patients After Mild Traumatic Brain Injury: A TRACK-TBI Study (Stein MB, et al., JAMA Psychiatry)

This guide is for education and self-care. It is not a diagnosis or a substitute for professional care. Please talk to a counselor or clinical provider about your health. Reviewed October 2026.

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