there is no formal diagnosis or mental health condition known as "split personality disorder." The term "split personality" was historically used to describe what is now referred to as Dissociative Identity Disorder (DID). However, it's important to note that DID does not cause individuals to pick fights or experience the pattern of rage followed by remorse that you described.
DID is a complex dissociative disorder in which an individual experiences distinct personality states or identities that control their behavior at different times. These identities may have their own memories, behaviors, and emotions. It is believed to develop as a response to severe trauma, often during childhood, as a way for the mind to cope and protect itself.
Post-Traumatic Stress Disorder (PTSD), on the other hand, is a separate condition characterized by experiencing intense stress reactions after a traumatic event. Symptoms can include flashbacks, nightmares, avoidance, and hypervigilance, among others. While PTSD can cause emotional difficulties and sometimes impulsive behaviors, it does not typically lead to the development of distinct personalities or cause someone to pick fights.
If someone is experiencing the pattern of aggressive behavior followed by remorse and a period of calm, it is essential for them to seek professional help from a mental health specialist. There may be an underlying mental health condition or other factors contributing to these behaviors, and a qualified professional can provide a proper evaluation and diagnosis, as well as appropriate treatment options. Therapy, counseling, and, if necessary, medication can be effective in managing symptoms and improving overall well-being.