Pseudologia Fantastica (Mythomania)

Pseudologia fantastica, also known as pathological lying or "mythomania," is the phenomenon of habitual or compulsive lying (either verbally or in writing) which was first described in medical literature in 1891 by Anton Delbruck. It is a controversial diagnosis because the subject often doesn't stand to gain anything from lying. The paradoxical thing about compulsive lying is that the subject may or may not know that they are lying although it is possible sometimes that a person may be lying to make their own life appear to be more exciting than it really is.