Causes & Risk Factors of Personality Disorders
There isn’t a concrete answer as to what causes personality disorders, but in many cases, they seem to be related to genetics: if there’s a personality disorder in your family, that puts you at a higher risk for developing one. Studies performed with twins and families suggest there’s a hereditary component of personality disorders, particularly in Cluster C.
There’s also a strong case that environmental factors play a role in developing personality disorders. Experiencing a traumatic event, cycles of physical or emotional abuse, or other instability — especially during early development — seems to play a role in the onset of a personality disorder.