How do you know if you have borderline personality disorder? Is the personality disorder diagnosed purely on symptoms? How does BPD manifest across different individual individuals? Borderline personality disorder is one of the most heterogeneous conditions in psychology. It manifest in so many different ways, that it can be very hard to detect. It is normal for someone to receive a misdiagnosis instead of a BPD diagnosis. Sometimes, clinicians are not as educated on BPD as they might need to be