It depends on the type (Bipolar I/Bipolar II).
Bipolar I: (At least) one manic episode preceded/followed by a major depressive episode. Mania could trigger from psychosis.
Bipolar II: (At least) one major depressive episode and (at least) one hypomanic episode, but never any manic episodes.
General symptoms: Manic or Hypomanic episodes, major depression, psychosis (depends on the person and or type).
