bipolar disorder is a form of mood disorder characterised by a variation of mood between a phase of manic or hypomanic elation, hyperactivity and hyper imagination, and a depressive phase of inhibition, slowness to conceive ideas and move, and anxiety or sadness. As described below, there are several forms of bipolar disorder. It should be noted that this disorder does not consist of mere "ups and downs". Ups and downs are experienced by virtually everyone and do not constitute a disorder. Th...

In psychiatry, borderline personality disorder (BPD) is a personality disorder characterised by extreme 'black and white' thinking, mood swings, emotional reasoning, disrupted relationships and difficulty in functioning in a way society accepts as normal.