Head knock at a game? What to do, and who clears them.

Every fall a parent describes the same scene. Their kid took a hit, got up, insisted they were fine, and finished the half. It was only in the car, or at dinner, or the next morning that something seemed off — quieter than usual, a headache, the lights in the kitchen suddenly annoying.

What counts as a concussion?

A concussion is a brain injury caused by a bump, blow or jolt to the head — or to the body, which surprises people. The head does not have to be struck. A hard hit that snaps the head around does it too.

The CDC's signs and symptoms list runs wider than most parents expect: headache, dizziness, nausea, vision problems and light or noise sensitivity, but also attention and memory trouble, feeling slowed down, irritability, sadness, and sleeping more or less than usual. An athlete who simply says they do not feel right belongs on that list too.

The part that catches families out is timing. Symptoms may not show up for hours or days. Feeling fine on the sideline is not evidence of anything.

Which signs mean the emergency room?

Some findings are not a wait-and-see matter. Call 911 for seizures or convulsions, loss of consciousness or trouble staying awake, repeated vomiting, a severe headache that keeps worsening, slurred speech or weakness, or one pupil larger than the other.

Nothing else in this article outranks that paragraph. If you are reading it while deciding, stop reading and go.

The same-day rule exists because the sideline is the worst place on earth to judge a brain.

Why the same-day rule is absolute

The CDC's guidance for responding to a sports-related concussion is direct: remove them from sports participation right away, and keep them out the same day of the injury and until cleared by a healthcare provider.

That is the whole rule, and the reason it is written so flatly is that every part of the situation pushes against it. The athlete wants to play. The game is close. The kid seems fine. None of that is information about their brain.

If your athlete gets hurt at a game and you are working out where to go tonight, we wrote a separate guide to emergency room, urgent care, or Monday morning.

What a chiropractor does and does not do here

We do not diagnose concussion and we do not clear anyone to return to play. Both belong with a physician, and you should be sceptical of anyone in our profession who offers otherwise. Saying so plainly matters more in this article than in any other on this site.

What is genuinely ours is the neck. A head that gets snapped around takes that force through the cervical spine, and a neck injured in the same impact produces headaches, dizziness and difficulty concentrating that look very much like concussion symptoms — and can outlast the concussion itself.

That overlap is why some athletes stay symptomatic well past the point everyone expected. When symptoms run past two to four weeks, the CDC advises seeing a specialist experienced in brain injury. Having the neck examined alongside that is reasonable, and it sits beside physician care rather than replacing it. Our piece on headaches that come from the neck covers how that presentation behaves.

The related injury worth knowing about in contact sport is the stinger — a different mechanism with a different urgency, covered in stingers and burners.

What do the first days at home look like?

Rest is the instinct, and complete rest in a dark room for a week is no longer what guidance supports. The current direction is a short period of relative rest followed by gradual, symptom-guided return to normal activity — light and sound tolerance permitting.

Practically, for a parent, that means watching rather than managing. Note what makes symptoms worse: screens, noise, a busy hallway, homework. Those are the things to reintroduce slowly. Sleep tends to be disrupted early and settles.

The thing to watch for is the direction of travel. Symptoms that are gradually easing, even unevenly, are the expected pattern. Symptoms that are worsening day over day are not, and that is a call back to the physician rather than a wait.

One practical step gets forgotten in the worry of the evening: tell the school. A coach knowing is not the same as the athletic trainer, the nurse and the teachers knowing, and the classroom is where a recovering brain gets tested hardest. Screens, noise and a full timetable are load too.

What about the hit that did not look like much?

Most concussions in youth sport do not involve a dramatic collision or anyone lying on the ground. They involve an ordinary-looking contact where the head moved fast and then stopped, and the athlete got straight back up.

That is worth saying clearly because the severity of the impact is a poor guide to the severity of the injury. A knock that had everyone wincing may be nothing. One nobody noticed may not be. Symptoms are the signal, not the replay.