Paranoia is when you feel scared or worried about things that may not be real or true. It is like when you see a shadow in your room at night and think there is a monster hiding there, even though there is nothing there. People who are paranoid might think that other people are trying to hurt them or that someone is always watching them. They may be very careful and not trust anyone, even if there is no reason to be afraid. It is important to talk to a grown-up if you feel paranoid, so they can help you understand what is really happening and how to feel safe.