People with Borderline Personality Disorder (BPD) do not have multiple personalities in the sense of Dissociative Identity Disorder (formerly known as Multiple Personality Disorder). Dissociative Identity Disorder (DID) involves the presence of two or more distinct identities or personality states within an individual, each with its own way of perceiving, relating to, and interacting with the world. These identities may take control of the person's behavior and memory at different times.
On the other hand, BPD is a different mental health condition characterized by pervasive patterns of instability in emotions, self-image, relationships, and behavior. People with BPD may indeed experience rapid and intense shifts in emotions and self-perception, which can lead to changes in behavior and how they interact with others. These emotional fluctuations can occur within a relatively short period, sometimes referred to as "mood swings."
The term "splitting" is often associated with BPD. It refers to the tendency of individuals with BPD to view people, situations, and themselves in extreme, all-or-nothing terms, which can contribute to changes in their feelings and behavior towards others.
It's essential to understand that these emotional changes and shifts in self-perception in BPD are not akin to the distinct, separate identities seen in Dissociative Identity Disorder.
If you suspect that someone may have symptoms of any mental health disorder, including BPD or DID, it is essential to encourage them to seek professional help and support from mental health professionals. Accurate diagnosis and appropriate treatment can make a significant difference in helping individuals manage their symptoms and improve their overall well-being.