One common question we get from trauma survivors is: What is the difference between Borderline Personality Disorder (BPD) and Complex Post-traumatic Stress Disorder (CPTSD)? As with all diagnoses, the nuances are really important to acknowledge when it comes to understanding diagnoses, diagnostic criteria and the events leading up to the diagnosis. Remember: self-diagnosis can be a destructive path. Find a professional to discuss your concerns with before assuming you meet diagnostic criteria for any mental health disorder.