Concussion Danger Signs
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In rare cases, a dangerous collection of blood (hematoma) may form on the brain after a bump, blow, or jolt to the head or body that may squeeze the brain against the skull. Call 9-1-1 right away, or take your child or teen to the emergency department if he or she has one or more of the following danger signs after a bump, blow, or jolt to the head or body:
Dangerous Signs & Symptoms of a Concussion
- One pupil larger than the other.
- Drowsiness or inability to wake up.
- A headache that gets worse and does not go away.
- Slurred speech, weakness, numbness, or decreased coordination.
- Repeated vomiting or nausea, convulsions or seizures (shaking or twitching).
- Unusual behavior, increased confusion, restlessness, or agitation.
- Loss of consciousness (passed out/knocked out). Even a brief loss of consciousness should be taken seriously.
Dangerous Signs & Symptoms of a Concussion for Toddlers and Infants
- Any of the signs and symptoms listed in the Danger Signs & Symptoms of a Concussion list.
- Will not stop crying and cannot be consoled.
- Will not nurse or eat.
HEADS UP Video: Concussion Danger Signs
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Learn More about Concussions and Brain Injury
- Page last reviewed: February 16, 2015
- Page last updated: February 16, 2015
- Content source:
- Centers for Disease Control and Prevention,
- National Center for Injury Prevention and Control,
- Division of Unintentional Injury Prevention