What is a concussion? Does my child have to be knocked out to have one?

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A concussion is a type of traumatic brain injury. CDC HEADS UP says it's caused by a bump, blow or jolt to the head, or a hit to the body that makes the head and brain move quickly back and forth. It can change how a child thinks, learns, feels, acts and sleeps. No, they don't have to be knocked out. NFHS guidance (2023) notes that fewer than 5% of athletes with a concussion lose consciousness. Other key facts: The athlete doesn't have to be hit directly on the head. A concussion usually doesn't show up on a CT or MRI scan, because it affects how the brain works rather than its structure. There's no such thing as a minor brain injury. Don't call it a "ding" or getting your "bell rung". Every suspected concussion should be taken seriously, and the child should be seen by a health care provider.