They may, however, experience some manic symptoms at the same time, which is also known as major depressive disorder with mixed features.Some bipolar disorder symptoms are similar to other illnesses, which can make it hard for a doctor to make a diagnosis.Family History: Bipolar disorder tends to run in families.Children with a parent or sibling who has bipolar disorder are much more likely to develop the illness, compared with children who do not have a family history of the disorder.
Note for Health Care Providers: People with bipolar disorder are more likely to seek help when they are depressed than when experiencing mania or hypomania.
But genes are not the only risk factor for bipolar disorder.
Studies of identical twins have shown that even if one twin develops bipolar disorder, the other twin does not always develop the disorder, despite the fact that identical twins share all of the same genes.
Psychosis: Sometimes, a person with severe episodes of mania or depression also has psychotic symptoms, such as hallucinations or delusions.
The psychotic symptoms tend to match the person’s extreme mood.
People with bipolar disorder experience periods of unusually intense emotion, changes in sleep patterns and activity levels, and unusual behaviors.