An official website of the United States government
Here’s how you know
Official websites use .gov A
.gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A
lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
A concussion is a type of brain injury. It involves a short loss of normal brain function. It happens when a hit to the head or body causes your head and ...