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Concussion (Traumatic Brain Injury)

Concussion (Traumatic Brain Injury)

A concussion occurs when the head sustains a hard blow and the impact jars or shakes the brain inside the skull, interrupting the brain's normal activities. Although there may be cuts or bruises on the head or face, there may be no other visible signs of a brain injury.

Symptoms of a concussion can include any of the following changes in the person's level of consciousness, such as:

  • Loss of consciousness.
  • Inability to remember what happened immediately before or after the injury (amnesia).
  • Confusion.
  • Asking the same question over and over.
  • Dizziness, vertigo, lightheadedness, or unsteadiness.
  • Blurred or double vision.
  • Ringing in the ears (tinnitus).
  • Changes in personality.
  • A decreased ability to talk or feed himself or herself.
  • Changes in how well a child is able to do physical activities, such as increased unsteadiness that makes it hard for the child to walk or stand.
  • In a small child, increased fussiness or lack of energy.
  • Ongoing headaches.

Symptoms of a concussion can be mild to severe, depending on the severity of the injury. If the injury is more serious, symptoms will usually develop within the first 24 hours after the accident. Symptoms may last for days, weeks, or even months following the injury.

Current as of: March 12, 2014

Author: Healthwise Staff

Medical Review: Anne C. Poinier, MD - Internal Medicine & William H. Blahd, Jr., MD, FACEP - Emergency Medicine

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.

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