There is still much not known about the causes of this condition. However, research has suggested that a genetic link is possible although no BPD gene has been identified yet, this is still an area being studied. Altered brain chemicals and brain development have also been identified as possible causes which may contribute to the symptoms of BPD.
Environmental factors also such as suffering abuse, neglect or being exposed to another family member with a serious mental health condition can contribute to both likelihood of having BPD and one’s ability to manage the condition. What we do know is that BPD is not a choice and it is not the individual’s fault that they have this condition.