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Delusional disorder is a mental health condition characterized by the presence of delusions, which are false beliefs held strongly despite evidence to the contrary. These delusions can significantly impact an individual's thoughts, emotions and behaviors. 

There are different types of delusional disorder, and understanding each one can help in proper diagnosis and treatment.

Persecutory delusions

Individuals with persecutory delusions believe they are being targeted, harassed, or conspired against by others. They may feel that someone is spying on them, plotting to harm them, or spreading rumors about them.

Grandiose delusions

Grandiose delusions involve an exaggerated sense of self-importance or abilities. Those affected may believe they have exceptional talents, wealth, or power beyond reality. For instance, they may think they are a famous personality or possess supernatural abilities.

Erotomanic delusions

In erotomanic delusions, individuals believe that someone, usually of higher social status, is in love with them. Despite lacking evidence or reciprocation, they maintain the belief that the person harbors romantic feelings towards them.

Somatic delusions

Somatic delusions involve false beliefs about one's body or health. This may include the conviction that one has a serious illness or disease, despite medical reassurance to the contrary, or the belief that parts of their body are disfigured or malfunctioning.

Jealous delusions

Jealous delusions revolve around the irrational belief that one's partner is unfaithful, despite a lack of evidence. This can lead to significant distress and strain in relationships.

Bizarre delusions

Delusions with bizarre content involve beliefs that are implausible, bizarre, or impossible in nature. These beliefs often defy cultural or societal norms and may include experiences such as alien abduction or being controlled by external forces.

Mixed delusions

Mixed delusions encompass a combination of different types of delusions. For example, an individual may simultaneously experience persecutory and grandiose delusions.

Unspecified delusions

In some cases, the specific theme of the delusion may not fit neatly into one of the aforementioned categories. These are classified as unspecified delusions. Some examples are religious delusions like those experienced by people with Jerusalem syndrome.