Unfortunately, borderline personality disorder (BPD) is not a well-known or well-understood disease. Even so, many people believe lying is part of the disorder. However, you may be surprised to learn that the link between BPD and deceit is not so clearly defined.
In fact, if you review the symptoms of BPD, lying is nowhere to be found. In the Diagnostic and Statistical Manual of Mental Illnesses-5th edition, which is the standard source healthcare providers use to make appropriate diagnoses, deceit is not part of BPD’s diagnostic criteria.1
However, that doesn’t necessarily mean that those with BPD do not lie or that they aren’t more likely to lie. In fact, many family members and friends of those with BPD cite lying as a major concern in their relationship with their BPD loved one.
Why Lying Occurs in BPD
There are a few potential reasons as to why lying may occur in people with BPD.