Categorical distinctions remain vital for clarity, prognosis, and treatment in personality disorder diagnosis.

"How can someone just decide you have a condition and then treat you as if you do?" she writes in a Reddit post Virginia Chamlee is a Politics Writer at PEOPLE. She has been working at PEOPLE for ...

Herschel Walker details his life with multiple personalities in new book. Jan. 21, 2008 — -- NFL superstar Herschel Walker has long suffered from multiple personality disorder, the Heisman Trophy ...