Mood Disorders ยท October 9, 2026
Bipolar Disorder vs. Depression: How to Tell the Difference
By Kathie Bolles, PMHNP-BC
The main difference between bipolar disorder and depression is the presence of manic or hypomanic episodes. In bipolar disorder, depressive periods alternate with episodes of elevated mood, energy, and activity; in major depressive disorder, there is no history of mania or hypomania. Because the depressive periods can look nearly identical, the diagnosis rests on whether manic or hypomanic episodes have ever occurred, which is why a careful history is so important. Mynd Works Psychiatry in Austin, Texas evaluates both conditions as part of mood disorder care.
What is the main difference between bipolar disorder and depression?
The National Institute of Mental Health describes bipolar disorder as involving extreme mood swings, with manic episodes of feeling very up, elated, or irritable and unusually energetic, alternating with major depressive episodes. Major depressive disorder involves depressive episodes without any history of mania or hypomania.
During a depressive episode the two can look identical, so the diagnosis depends on whether manic or hypomanic episodes have ever occurred.
Why does the distinction matter?
The distinction changes treatment. Medication used for unipolar depression can, in some people with bipolar disorder, be associated with mood elevation or worsening, which is one reason clinicians screen for a history of mania or hypomania before starting treatment.
The NIMH has noted that bipolar symptoms can go undiagnosed in people who present with depression, which is why a thorough evaluation matters.
What are the signs of a manic or hypomanic episode?
A manic episode involves a distinct period of abnormally elevated, expansive, or irritable mood and increased energy or activity, lasting for a defined period and often noticeable to others. Hypomania is a milder version that may not cause the same level of disruption.
Signs can include feeling unusually energetic with little need for sleep, rapid thoughts or speech, grand plans, increased risk-taking, and irritability.
What features raise the possibility of bipolar depression?
Certain features can make bipolar depression more likely, including an earlier age of onset, frequent or shorter depressive episodes, atypical symptoms such as increased sleep and appetite, a family history of bipolar disorder, or mood elevation after starting an antidepressant.
These are clinical clues, not a diagnosis. Only a qualified clinician can determine what they mean for you.
How is the evaluation done?
Evaluation for bipolar disorder or depression begins with a detailed clinical interview covering your history, symptom patterns, sleep, energy, and any past episodes. The clinician also reviews co-occurring conditions, because mood disorders frequently overlap with anxiety, ADHD, and other conditions.
This is the same careful process used for any psychiatric evaluation.
How does treatment differ?
Treatment for bipolar disorder focuses on mood stability and long-term monitoring, often with mood-stabilizing medication and ongoing support. Treatment for depression focuses on relieving depressive symptoms through approaches such as medication management and psychotherapy.
In both cases, care is personalized, collaborative, and reviewed over time rather than assumed to work.
Common questions
Can bipolar disorder be mistaken for depression?
Yes. Because depressive episodes can look identical, bipolar disorder can be missed in people who present with depression, which is why clinicians screen for a history of manic or hypomanic episodes.
What is the difference between mania and hypomania?
Mania is a more severe episode of elevated mood and energy that often causes significant disruption; hypomania is a milder version that may be less disruptive but is still clinically significant.
Does Mynd Works evaluate bipolar disorder in Austin?
Yes. Bipolar disorder and mood disorders are among the conditions Mynd Works evaluates and treats, in person in Austin or by secure telehealth where clinically appropriate.
