Difference Between Bipolar Disorder and Borderline Personality Disorder

I was diagnosed bipolar II at the age of 20 but because bipolar type II is so similar to borderline personality disorder its difficult. I have had two diagnoses of bipolar type II and one of BPD.

What exactly is the difference between bipolar II disorder and borderline personality disorder? This question has come up a number of times and since the treatments can be different it is important to try to sort this out. The main reason for the overlapping diagnoses is that both disorders include problems with mood regulation — those suffering with these conditions experience mood states that are more severe than is typical and that happen frequently enough to cause significant challenges in day-to-day life.

Some time ago, we did a two part series on the differences in diagnosis and treatment of bipolar disorder and borderline personality disorder, starting with “Borderline Personality and Bipolar Disorder Differences Part I: Diagnosis.” At the end of that post, you’ll find a link to Part II.

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