When someone says a kid is hyperactive, it can be a sign that the kid might have ADHD. ADHD stands for a condition called attention deficit hyperactivity disorder.
Kids with ADHD have problems paying attention and sitting still in their seats, and they can be impulsive,which means doing things without thinking about the results. This can cause problems like getting hurt. Some kids who have ADHD can have difficulty in school. Some might have trouble making friends.
ADHD is something a kid is born with. It is not something like the flu that you can catch from someone. A kid has a greater chance of being born with ADHD if he or she has a relative who has ADHD.