Cách sử dụng
A concussion is a type of injury that can happen to your brain when you hit your head hard. It can be caused by things like falling or getting hit in the head, and can make you feel dizzy, confused, or even pass out. If you think you have a concussion, it's important to see a doctor right away. It's also important to protect your head from getting hurt again in the future, by wearing a helmet when you play sports or ride a bike.