I once met a man who believed he had another person, a soul, living inside of him. It brought him comfort—a psychological construct. I didn’t take it literally, but I took it seriously. I once ...

Comorbidity is when a person has more than one health condition at once. Researchers investigating the comorbidity of personality disorders have found people with certain disorders may have other ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. I was too old for this. That was the thought running through my mind as ...

A visual representation of split personality disorder. When people hear the word "split personality", they often tend to link it with the movies and the vision of a person flipping between the two ...

How do we distinguish between bipolar mood disorder, cyclothymic temperament, and borderline personality disorder? This may be among the most important questions in clinical psychiatry and ...

Genetics is just one of several factors thought to influence personality disorder development. Life experiences, family dynamics, coping mechanisms, and social learning may all be contributing factors ...

Many medical terms have evolved or changed over the years to reflect advancements in medical knowledge or to reduce stigma. For example, what was once called consumption is now known to be ...