What are the most rare psychological disorders?
Factitious disorder tends to affect less than 0.5% of the population. Also known as ‘imposter syndrome’ or Capgras Delusion. People with this mental health condition believe that someone in their life that plays a significant role what been replaced with an imposter. Here we look at two of the most common severe mental illnesses: schizophrenia and bipolar disorder (or manic depression). Schizophrenia is a serious mental illness that affects a person’s thinking, and that can consequently alter their perception of reality, their emotions and their behaviour. But in the shadows are a cluster of conditions that continue to face deep discrimination: schizophrenia, psychosis, bipolar disorder, and BPD. BPD in particular is one of the lesser-known mental illnesses, but all the same it is one of the hardest to reckon with. But in the shadows are a cluster of conditions that continue to face deep discrimination: schizophrenia, psychosis, bipolar disorder, and BPD. BPD in particular is one of the lesser-known mental illnesses, but all the same it is one of the hardest to reckon with. But in the shadows are a cluster of conditions that continue to face deep discrimination: schizophrenia, psychosis, bipolar disorder, and BPD. BPD in particular is one of the lesser-known mental illnesses, but all the same it is one of the hardest to reckon with. By all accounts, serious mental illnesses include “schizophrenia-spectrum disorders,” “severe bipolar disorder,” and “severe major depression” as specifically and narrowly defined in DSM. People with those disorders comprise the bulk of those with serious mental illness.