The essential characteristic of people with paranoid personality disorder is paranoia, a relentless mistrust and suspicion of others without adequate reason to be suspicious. People with PPD are always on guard, believing that others are constantly trying to demean, harm, or threaten them. These generally unfounded beliefs, as well as their habits of blame and distrust, interfere with their ability to form close or even workable relationships. This disorder falls under cluster A. Treatment of PPD is very diffucult, as there no medications for the disorder and people with the disoder, tend not to trust the people treating them.
There are not many stigmas, that is associated with PPD, but that is due to the low knowledge of the disorder in the general public. People often mistake paranoid personality disorder with other disorders, such as schizophernia. Not only that, but people think that people with this disorder try to cause trouble on purpose, which is very untrue.