mythomania

1 of 1noun

/ˌmɪ.θə.ˈmeɪ.niə/

an excessive or abnormal tendency to lie and fabricate stories, often without any clear motive or benefit

The psychiatrist diagnosed the patient with mythomania after uncovering a pattern of elaborate and unnecessary lies.
Her mythomania made it difficult for her friends to trust anything she said.
In cases of mythomania, the individual often believes their own fabrications, blurring the line between truth and fiction.
His mythomania led him to create an entirely fictional career history, which eventually unraveled and cost him his job.
The writer's mythomania was both a gift and a curse, fueling his creativity but also causing personal and professional issues.