TBI symptoms vary depending on the extent of the injury and the area of the brain affected. Some symptoms appear immediately; others may appear several days or even weeks later. A person with TBI may or may not lose consciousness—loss of consciousness is not always a sign of severe TBI.
A person with a mild TBI may experience:
A person with moderate or severe TBI may have some of the symptoms listed above. In addition, the person may experience any of the following:
A person who suffers a blow to the head or another trauma that may have caused a TBI should seek medical attention.4
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