What is the difference between borderline personality disorder and bipolar disorder?

What is the difference between borderline personality disorder and bipolar disorder?

While bipolar disorder is also characterized by wide fluctuations in mood and behavior, it’s distinct from borderline personality disorder (BPD).

In BPD, mood and behavior change rapidly in response to significant stress, especially when interacting with other people, whereas in bipolar disorder, moods are more sustained and less reactive. People with bipolar disorder also have significant changes in energy and activity, unlike those with BPD.