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Psychotic disorders are serious mental disorders that cause abnormal thoughts and perceptions. People with psychosis lose touch with reality. Two of the main symptoms are delusions and hallucinations. Delusions are false beliefs, such as the idea that someone is against them or that television is sending them secret messages. Hallucinations are false perceptions, such as hearing, seeing, or feeling something that is not there. Schizophrenia is a type of psychotic disorder. People with bipolar disorder may also have psychotic symptoms. Other problems that can cause psychosis include alcohol and certain medications, brain tumors, brain infections, and stroke. Treatment depends on the cause of the psychosis. It may include medications to control symptoms and talk therapy. Hospitalization is an option for serious cases where a person may be dangerous to themselves or others.