Many people experience sudden changes of mood, with happy or euphoric up periods and sad or depressed low periods. For a diagnosis of bipolar or related disorder to be made, a qualified health professional must:
- evaluate the symptoms to determine if at least one episode of mania, hypomania, or depression (see below) has occurred;
- rule out causes by other medical conditions, psychiatric disorders, or substance use;
- determine whether the disorder has caused significant distress or impairment in the person’s functioning.
There are several types of bipolar and related disorders. The symptoms are somewhat different for each type and may vary from person to person. The common element for all these disorders is the presence of some degree of mania and usually, though not always, depression. There are 3 kinds of episodes associated with these disorders:
Manic Episode – a period of unusually elevated, expansive or irritable mood, lasting at least 1 week and present for most of the day, nearly every day. A person in a manic episode may exhibit all or some of the following symptoms:
- An inflated sense of self-esteem, also known as grandiosity.
- Decreased need for sleep.
- More talkative than usual.
- A feeling that one’s thoughts are racing, also known as flight of ideas.
- Distractibility.
- An increase in goal-directed activity, whether socially, at school or work, or sexually.
- Agitation or a heightened sense of irritability, making a person seem argumentative or hostile.
- Engaging in high-risk activities, such as gambling, buying sprees, sexual indiscretions, or foolish business ventures.
Major Depressive Episode – a period of depressed mood, lasting at least 2 weeks and representing a change from previous functioning. A person in a major depressive episode may exhibit all or some of the following symptoms:
- Feelings of sadness, loneliness, or emptiness that last most of the day for several days on end.
- Loss of interest or pleasure in activities that used to be enjoyable, also known as anhedonia.
- Constant tiredness or loss of energy.
- Difficulty thinking clearly, concentrating, making decisions, or remembering.
- Feelings of worthlessness or excessive or inappropriate guilt.
- Feelings of irritability, frustration, or anger that are out of proportion with the circumstances.
- Restlessness and agitation.
- Sleep disturbances, including sleeping too much and sleeping too little.
- Change of appetite, most often leading to loss of weight, though some people may experience increased appetite and weight gain.
- Recurrent thoughts of death or suicide, as well as suicide attempts or plans.
Hypomanic Episode – a period of unusually elevated, expansive or irritable mood, with many of the same symptoms as a manic episode, but not severe enough to cause marked impairment in social or occupational functioning.
There are 4 basic types of bipolar and bipolar-related disorders:
Bipolar I disorder – A person with Bipolar I has experienced at least 1 manic episode that is serious enough to cause significant distress or impairment, such as a break from reality, behavior leading to arrest or other severe consequences, or the need for hospitalization. A person with Bipolar I may also have had 1 or more episodes of major depression, although the presence of depression is not required for this diagnosis.
Bipolar II disorder – A person with Bipolar II has experienced at least one major depressive episode lasting at least two weeks and at least one hypomanic episode lasting at least four days, but has never had a full manic episode.
Cyclothymic disorder – A person with cyclothymia has experienced multiple periods of hypomanic and depressive symptoms over the course of at least two years. These symptoms, which fall short of a full hypomanic or major depressive episode, occur at least half the time and do not disappear for more than two months at a time.
Other types of bipolar-related disorders – This category of disorders involves bipolar-like symptoms caused by substance use or medication, other medical conditions, or disorders that do not meet the full criteria for the above 3 disorders.
Bipolar disorder can be difficult to diagnose, especially in children and adolescents. There is currently no test available to determine if a person has one of these disorders. Symptoms of bipolar disorder are sometimes confused with attention deficit hyperactivity disorder (ADHD), schizophrenia and other psychotic disorders, borderline personality disorder, and major depressive disorder, especially when a manic or hypomanic episode has yet to occur in the case of the latter. Schizoaffective disorder is a separate condition that combines symptoms of schizophrenia, such as hallucinations and delusions, with symptoms of a mood disorder, such as mania and depression.