ELI5: Explain Like I'm 5

Solipsism syndrome

Solipsism Syndrome is a psychological condition where a person believes that nothing exists except for themselves; in other words, they believe that they are the only real person in the world. This could mean that they think that everything around them is just a product of their own imagination. People who experience Solipsism Syndrome usually have difficulty interacting with people and having relationships, since they don't accept that the other people are real. They may also feel anxious and paranoid since they think they are the only person in a world that they cannot control.