Delusional disorder

Delusional disorder is a type of mental disorder where a person has strong beliefs that are not true. These beliefs can be very strange, and they stick with the person no matter what. People with delusional disorder might believe that they are famous, that someone is out to get them, or that they can do something impossible. People with delusional disorder usually act normal, but it can be hard for them to understand why people don't believe the same things as them.