What is a concussion?
A concussion is an injury to the brain caused by a blow to
the head. A concussion may cause you to become temporarily
confused or disoriented, have memory loss (amnesia), or
become unconscious.
How does it occur?
A concussion occurs when a blow to the head causes shaking,
jarring, stretching, swelling, or tearing of brain tissue
and delicate nerve fibers.
What are the symptoms?
If you have had a concussion you may have any of the
following symptoms:
- headache
- confusion
- memory loss (amnesia)
- loss of consciousness
- sleepiness
- nausea or vomiting
- trouble concentrating
- dizziness
- weakness
- seizures
- loss of balance.
You may have these symptoms, called post-concussive
syndrome, for several days or weeks after the injury.
How is it diagnosed?
Your health care provider will examine you and find out what
happened. If you can't remember what happened, he or she
may need to get this information from other people saw the
accident. Your health care provider will do a neurologic
examination, testing your strength, sensation, balance,
reflexes, and memory. He or she will also look at your eyes
with a flashlight to see if your pupils are the same size.
You may be tested again several times during the next hour
to detect any worsening of brain function, which might occur
if you have any bleeding or swelling in the brain.
Your provider may do a special x-ray called a computed
tomography (CT) scan or a magnetic resonance image (MRI) of
your head to be sure there is no damage to your brain.
Depending on how your head injury occurred, you may have
neck x-rays to check your spine.
How is it treated?
The treatment for a concussion is rest. Headache may be
treated with a mild pain reliever. Nausea may be treated
with a medicine.
If you have had a concussion, you need to be watched by a
friend or relative for 8 to 12 hours. You should be
awakened and checked every 2 to 4 hours while sleeping.
Symptoms to report to your health care provider include:
- confusion
- seizures
- unequal pupil sizes
- restlessness or irritability
- trouble using your legs or arms
- worsening vomiting
- headache that will not go away after being treated with
acetaminophen (Tylenol)
- garbled speech
- bleeding from the ears or nose
- decreasing alertness
- unusual sleepiness
- unusual behavior.
If you are stable and recovering during the next 24 hours,
you should rest for an additional day or two. As your
symptoms go away, you can begin to go back to your usual
daily routine. However, you should stay away from any
activities that would risk reinjury. A second concussion
before the first one has healed could be very serious. Your
health care provider will tell you when it is safe to return
to sports and other activities.
How can I prevent a concussion
Using proper equipment (such as helmets and seat belts) and
following proper techniques in sports such as football and
soccer are the best ways to prevent concussions. When
accidents do happen, however, concussions can be severe. It
is especially important to understand that receiving a
second blow to the head before the first injury is fully
healed can be fatal, even if the second injury seems minor.


Disclaimer: This content is reviewed periodically and is subject to
change as new health information becomes available. The
information provided is intended to be informative and educational and is not a
replacement for professional medical evaluation, advice, diagnosis or
treatment by a healthcare professional.
HIA File BRN3406F.HTM Release 9.0/2006. Copyright © 2006 McKesson Corporation and/or one of its subdiaries. All Rights Reserved.
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