Bipolar disorder involves episodes of mania, depression, or hypomania. These shifts in mood are the key characteristic of this mental health condition, but it's not unusual for people living with bipolar disorder to also have symptoms of psychosis. Bipolar with psychotic features can closely resemble schizoaffective disorder. People living with this condition have combined symptoms of schizophrenia and bipolar disorder — a mix of mania or hypomania, depression, and psychosis. This complex array of symptoms can make schizoaffective disorder harder to diagnose. The fact that schizophrenia, like bipolar and schizoaffective disorders, can involve depression and psychosis only adds another layer of complication. Some experts believe the significant overlap between these three conditions suggests they occur on something of a spectrum: Bipolar disorder at one end, schizophrenia at the other, and schizoaffective disorder representing a midpoint between the two. For now, experts still reco...