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.
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
Asking the same question over and
Dizziness, vertigo, lightheadedness, or
Blurred or double vision.
Ringing in the
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
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.
Anne C. Poinier, MD - Internal Medicine & William H. Blahd, Jr., MD, FACEP - Emergency Medicine
How this information was developed to help you make better health decisions.
The Health Encyclopedia contains general health information. Not all treatments or services described are covered benefits for Kaiser Permanente members or offered as services by Kaiser Permanente. For a list of covered benefits, please refer to your Evidence of Coverage or Summary Plan Description. For recommended treatments, please consult with your health care provider.