Here’s an interesting interview with Dr. Christian Schmaal about the “chemical” causes of Borderline Personality Disorder. Dr. Schmaal details his beliefs on some of the physiological causes of BPD, pain tolerance in relation to self-harm, and the ever expanding knowledge base clinicians have for treating those afflicted with BPD.
I actually find these scientific reviews of BPD a bit comforting, because it allows me to excuse some of my irrational behaviors based on brain chemistry. If, for example, you know that you’re prone to impulsive acts, it may be because of your genetics and neurology, versus some sort of moral/ethical deficiency.
This is especially helpful for educating those around you about BPD: if they know there is a chemical component (much like a chronic disease like Diabetes demands insulin treatment) they might be more forgiving and understanding when you have BPD flare ups.