Why do people with BPD lie?

a young man holds his glasses in front of his chest while he rubs his eyes with the other hand

Lying is a common behavior for folks with borderline personality disorder (BPD) or other emotional dysregulation problems and is often quite distressing for everyone involved. Common approaches, such as trying to get to the bottom of the truth, forcing the person to come clean and admit the lie, or punishing the person, tend to be ineffective…