Bipolar disorder is also called manic depression. It is similar to depression except for the fact that the periods of depression are interrupted by brief (a matter of days at most) periods of mania where the subject feels inexplicably “up” about everything with heightened energy and a general disregard for consequences. The depressive stages are similar in all ways to depression. The manic stages are dangerous since the subject will take risks, spend wildly, and generally engage in behavior without much in the way of forethought or potential long term consequences.
Because of the nature of Eclipse Phase and the ability to swap out and modify a body, this is a fairly common disorder. It is suggested that characters with this suffer increased or prolonged resleeving penalties since they are unable to fully adjust to the reality of their new morph.