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 ...

Have you ever felt like there are different versions of you living inside your mind, each with its own thoughts, feelings, and even memories? This feeling can be more than just an expression of having ...

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 ...

Spurred by her past struggles with dissociative identity disorder, she has devoted her professional life to studying it.

Rates of bipolar disorder diagnoses have been rising for decades, causing concern among experts that the condition is overdiagnosed. Because bipolar disorder overlaps with other illnesses, ...

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 ...

In psychiatry, there’s no more controversial diagnosis than dissociative identity disorder (DID), the disorder formerly known as multiple personality disorder (MPD). First appearing in the third ...