Psychiatrist Doctor Judith Joseph has outlined five of the signs that could point to you having multiple personality disorder, which is also known as Dissociative Identity Disorder (DID). The world of mental health is an expansive one filled to the brim with disorders and illnesses that you’ve probably never heard of. Outside of depression and anxiety, you have narcissism, which is said to decrease with age, PTSD, Psychopathy, Schizophrenia, and antisocial personality disorder to name but a few. What is multiple personality disorder?Multiple Personality Disorder (MPD) is a rare illness that on…