Concussion Myths and Facts

By 4Football Staff · November 5, 2026 · 10 min read

Many common beliefs about concussions are outdated or wrong. This guide separates myth from fact on helmets, knocked-out players, rest, recovery and toughness, and tells you where to get medical advice.

Few topics in football are surrounded by as many half-remembered rules as concussions. Someone's uncle was told to stay awake all night. A coach once said you had to lose consciousness for it to count. A teammate played through one and seemed fine. Because the folk wisdom has been handed down for decades, and because the science has moved, a lot of it is now out of date.

This article takes the most common beliefs one at a time and says what current medical understanding is. It is general education for players, parents, coaches and fans. It does not diagnose anything and cannot replace a health care professional. If a player may have a concussion, the answer is the same in every case: remove the player from play and have the player evaluated by a qualified health care professional. If there are any danger signs, such as repeated vomiting, worsening headache, confusion, seizures, trouble waking up or weakness, call 911.

Medical guidance on concussion has been revised several times, and expert consensus statements are updated periodically. Where this article describes current thinking, check with your doctor and your league or state rules for the version that applies to you.

First, what a concussion is

A concussion is a type of mild traumatic brain injury. It is caused by a bump, blow or jolt to the head, or to the body in a way that makes the head move rapidly back and forth. The injury changes how the brain functions for a time. It is typically not visible on routine imaging, which is one reason diagnosis depends on symptoms and examination.

Common symptoms include headache, dizziness, nausea, balance trouble, sensitivity to light or noise, feeling foggy or slowed down, trouble concentrating, memory problems, irritability, sadness, anxiety and sleep changes. Symptoms may show up right away or hours later. Our guide to recognizing the symptoms lists them in more detail. With that in mind, here are the myths.

Myth 1: You have to be knocked out to have a concussion

Fact: Most concussions occur without loss of consciousness. Many players who have a concussion remain on their feet, talk normally and want to keep playing. Loss of consciousness can happen, and it needs urgent attention, but its absence tells you very little.

This myth matters because it sets a dangerous bar. A coach who waits to see whether a player "went out" before taking a concussion seriously will miss most cases. The better rule is: if a player has taken a hit and shows any symptom or any change in behavior, treat it as a possible concussion until a professional says otherwise.

Myth 2: Concussions only come from hits to the head

Fact: A concussion can follow a blow to the body that whips the head. A hard tackle at the shoulder or torso can cause the head to snap in a way that jolts the brain. Contact with the ground can also cause a concussion, as can contact with another player's knee or elbow.

That is part of why tackling technique and rules about contact matter, and why many injury-prevention rules focus on how contact happens, not just where it lands. Coaches teach tackling with the head up and out of the contact for this reason.

Myth 3: A good helmet prevents concussions

Fact: Helmets are essential protective equipment, and they reduce the risk of skull fractures and other severe head injuries. No helmet can prevent concussions entirely. A concussion involves the brain moving inside the skull, and the shell and padding can only manage some of the forces involved.

Helmet makers and standard-setting bodies are careful about this. Manufacturers' warnings state that no helmet can eliminate the risk of serious head or neck injury, and you will find such language in the labels. Better helmets may reduce risk in measurable ways in laboratory conditions. The overall effect on real-world concussion rates is harder to prove, and research continues. Our article on helmet technology and standards covers what standards test and what they do not.

The practical consequence is simple. A helmet gives a player no license to hit with the head, and a player in the best helmet available should still be removed from play when a concussion is suspected.

Myth 4: Mouthguards prevent concussions

Fact: Mouthguards protect teeth, lips and the jaw, and they are valuable for that reason. Claims that mouthguards reduce concussions have been made, but the evidence is not strong enough to promise that. Treat a mouthguard as dental protection, not brain protection.

Myth 5: If the scan is normal, there is no concussion

Fact: Standard CT and MRI scans usually look normal after a concussion. A scan may be ordered to rule out bleeding or a fracture, which is serious and important, but a normal result does not mean there was no concussion. The diagnosis rests on the history of the injury, the symptoms, and findings from a physical and neurological examination, sometimes along with specialized tests.

Myth 6: A concussion is just a "ding" or "bell-ringer"

Fact: Those casual terms understate what happened. A concussion is an injury to the brain. Most people recover fully, but the injury is real, and continuing to play before recovery is complete carries risks. Using plain language, such as "possible concussion," helps teams treat the situation seriously.

Myth 7: You should wake the person every hour

Fact: This old advice came from a time when the main concern was missing a worsening condition. Current guidance is more nuanced, and sleep is not generally considered harmful for a person with a concussion who has been assessed. What matters is what a medical professional tells you after an evaluation. If a person is very hard to wake, confused or showing danger signs, that is an emergency regardless of the time of day. Follow the instructions given by the clinician who examined the patient, and call 911 if you are worried.

Myth 8: The best treatment is total rest in a dark room for days

Fact: Older recommendations told people to avoid nearly all activity until symptoms vanished completely. More recent consensus guidance recommends a short period of relative rest, often described as a day or two, followed by a gradual, supervised return to normal activity, including school and light exercise, as symptoms allow. Prolonged, complete inactivity does not appear to speed recovery and may make some people feel worse.

The specifics depend on the person, so follow the plan from the health care provider. Do not treat this as a guide to when to return to football. Returning to contact is a separate, stepwise process with its own rules. Our guide to return-to-play protocols explains the general sequence.

Myth 9: Once the headache is gone, the player is ready

Fact: Symptoms may fade before the brain has fully recovered. That is why return-to-play protocols require a player to be symptom-free at rest, then symptom-free through a series of gradually harder activities, before returning to contact, and to have clearance from a qualified professional. Skipping steps because a player "feels fine" is how re-injuries happen.

Myth 10: Kids bounce back faster than adults

Fact: Young athletes often take longer to recover than adults, and their brains are still developing. Children and teenagers are typically managed more conservatively. A high school player who seems fine after two days may need more time than a professional would. This is part of why state laws on youth concussions exist.

Myth 11: You can tough it out

Fact: Playing through symptoms is not heroic, and it can be dangerous. A second blow to a brain that has not recovered can make symptoms worse or longer-lasting. In rare cases it may cause severe injury. The exact mechanism and frequency of such events are debated by researchers, and no one should rely on a number. The practical rule needs no debate: a player who may have a concussion should not play until cleared.

Football's culture has historically rewarded players who stay in the game. Reporting symptoms is not weakness. It is part of the game's safety system, and it depends on honesty.

Myth 12: One concussion means the player must quit football

Fact: Many people who have had a concussion recover fully and return to sport. Whether and when a player returns is a decision for the player, the family and the health care provider, based on the individual case. Repeated concussions, or concussions that take unusually long to heal, are reasons for a more careful conversation about risk. There is no universal number that applies to everyone.

Myth 13: Concussions only matter in the short term

Fact: Most people recover within days to weeks, but some experience symptoms that last longer. Researchers are studying the long-term effects of repeated head impacts, and the findings are complex and still evolving. It would be wrong to say that every football player will have lasting problems, and it would also be wrong to say that there is no risk. This is a reason to follow safety rules, to teach safe techniques and to take each possible concussion seriously.

Myth 14: The sideline can handle it on its own

Fact: Coaches and teammates are not qualified to judge whether a player has a concussion, and a player's own opinion is unreliable because the injury affects judgment. Many schools and leagues have trained athletic trainers or physicians do the evaluation. Our article on the role of the athletic trainer describes who does that work. Where no such person is present, the conservative rule is to hold the player out and arrange a medical evaluation.

Why the myths hang on

Most of these beliefs are not foolish. They were passed along by coaches, parents and doctors who were doing their best with what was known at the time. A few reasons they last:

• Concussions are invisible. There is no cast or swelling to point at, so people fall back on rules of thumb.
• Players hide symptoms. Athletes want to play, and a player who says "I'm fine" is believed more often than he should be.
• Stories stick. Everyone knows someone who was hit hard and seemed fine, and that one story outweighs the guidance.
• The science keeps moving. Advice that was standard a generation ago, such as strict dark-room rest, has since been revised, and old advice lingers long after it changes.

The remedy is not to memorize a new set of rules from one article. It is to rely on trained people and current guidance, and to ask what the current guidance is.

What the law says

Every state in the United States, and the District of Columbia, has a youth concussion law, following the example set by an early law in Washington State. The laws differ, but they commonly include three elements:

1. Education. Coaches, athletes and parents receive information about concussions, and sometimes sign an acknowledgment.
2. Removal from play. A youth athlete suspected of a concussion must be removed from the game or practice.
3. Return-to-play clearance. The athlete may not return the same day, and may not resume until a designated health care professional gives written permission.

The wording, the list of professionals who can clear a player, and the age range covered vary by state. Check your state's law, and ask your school or league how it applies. Colleges and professional leagues have their own protocols, set by their governing bodies and agreements.

Quick reference: myth versus fact

What to do if you suspect a concussion

1. Stop play. Take the athlete out right away.
2. Do not leave the athlete alone. Someone should stay with them.
3. Call 911 for any danger sign. Examples are loss of consciousness, repeated vomiting, seizure, increasing confusion or drowsiness, weakness or numbness, a headache that gets worse, slurred speech, or unequal pupils.
4. Get a medical evaluation. A doctor, athletic trainer or other qualified professional should assess the athlete.
5. Follow the plan. That includes limits on screens and activity if recommended, a gradual return to school and a stepwise return to sport.
6. Do not return the same day. This is the standard rule at every level.
7. Tell the others. Inform the coach, the school and any other team your child plays on.

Following professional football, you may notice that the league's injury report lists players as out or questionable with head injuries, and the process behind those designations is more cautious than it was a generation ago. At lower levels, the rules are local, so use the high school directory or the Play section to find your program and ask what its policy is.

The short version

• Most concussions do not involve loss of consciousness, and they can result from hits to the body.
• Helmets reduce some serious injuries but do not prevent concussions; mouthguards protect teeth.
• Normal scans do not rule out a concussion. Diagnosis comes from symptoms and examination.
• Brief rest followed by gradual, supervised activity is now preferred over long, strict rest.
• Feeling better is not clearance. Return to play follows steps and written permission.
• Young athletes often recover more slowly and are managed more conservatively.
• Remove, evaluate, and follow the plan. Call 911 for danger signs.