Distinguishing Borderline Personality Disorder from Bipolar II disorder is challenging due to overlapping symptoms, but BPD typically involves more frequent mood changes.

“and actually probably the ones the overlap that is more consistent or difficult to discriminate is bipolar ii because bipolar one is associated with the depression longer longer lengths of either a pure manic state or a pure depressed state bipolar ii might have manic states but it is shorter in duration or might not be you know super manic right as high and so that's that's often really hard to discriminate from um somebody uh who has borderline personality disorder and generally what we're talking about with with bpd as opposed to bipolar is that we actually see the mood changes happening more frequently within bpd than with um bipolar ii”