The Different Types of Bipolar Disorder Explained

The main types of bipolar disorder are Bipolar I disorder, Bipolar II disorder, cyclothymic disorder, and other specified or unspecified bipolar and related disorders. Clinicians distinguish these types by the pattern, length, and severity of mood episodes, not by personality or a single “high” or “low” day.

What Is Bipolar Disorder?

Bipolar disorder is a mental health condition marked by significant mood shifts, energy changes, and activity-level changes. Those changes range from manic or hypomanic highs to depressive lows, and they can last days, weeks, or longer. Between episodes, many people return to a more even baseline, though that stretch of stability looks different from person to person.(1)(2)

Mental health professionals diagnose bipolar disorder using criteria published by the American Psychiatric Association (APA) in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5, now updated as DSM-5-TR).(2) There is no blood test or brain scan that confirms the condition. The specific pattern, length, and severity of a person’s episodes determine which type of bipolar disorder may apply. A mental health clinician also reviews general health history so thyroid disease, sleep problems, or substance effects are not mistaken for a primary mental health diagnosis.

What Are Mood Episodes?

The types of bipolar disorder are built from a small set of episode patterns:

Manic episodes: Abnormally elevated, expansive, or irritable mood plus increased energy. In DSM-5 terms, mania lasts at least seven days (most of the day, nearly every day) or any duration if hospital care is needed.(1)

Hypomanic episodes: The same kind of elevated or irritable energy as mania, but shorter and less impairing. Hypomania lasts at least four consecutive days, does not include psychosis, and is not severe enough on its own to require hospitalization.(1)(2)

Depressive episodes: Low mood, loss of interest, fatigue, and sleep or concentration changes that typically last at least two weeks. These episodes can be mistaken for unipolar depression if earlier highs were never recognized.(1)

Mixed episodes / mixed features: Manic or hypomanic energy and depressive symptoms at the same time for example, racing thoughts with hopelessness. DSM-5-TR uses “mixed features”; families may still hear “mixed episode.”(2)

The 4 Main Types of Bipolar Disorder

Clinicians generally group bipolar disorder into four diagnostic categories. The question is not “how bipolar is this person?” It is “which episode pattern has actually occurred?”

Bipolar I Disorder

Bipolar I disorder is defined by at least one full manic episode. That episode may stand alone, or it may be preceded or followed by hypomanic or major depressive episodes. A depressive episode is common in bipolar I, but it is not required for the diagnosis. One manic episode is enough.(1)

Manic episodes in bipolar I can be severe enough to require hospitalization and may include psychosis, such as delusions or hallucinations. Families often first seek help here because functioning, safety, or insight has clearly broken down.

Bipolar II Disorder

Bipolar II disorder involves a pattern of major depressive episodes and hypomanic episodes—but never a full manic episode. If a full manic episode occurs later, the diagnosis changes to bipolar I.(1)

A common misconception is that bipolar II is a “milder” version of bipolar I. That is not accurate. Hypomania is less severe than mania, but the depressive episodes in bipolar II can be significant and long-lasting. Hypomania can look like a burst of productivity after depression, so it is often missed and treated as depression alone.(1)(3)

Cyclothymic Disorder

Cyclothymic disorder (cyclothymia) involves numerous periods of hypomanic symptoms and numerous periods of depressive symptoms that do not meet full criteria for a hypomanic episode or a major depressive episode.(1)

In adults, those symptoms must be present for at least two years (one year in children and teens). During that window, the ups and downs are present at least half the time, and the person is not symptom-free for more than two consecutive months. Full manic, hypomanic, or major depressive episodes have never occurred. If a full episode later appears, the diagnosis is updated.(1)

The swings are smaller on paper, but they are frequent. Living with a mood that rarely settles can still strain work, relationships, and daily routine.

Other Specified and Unspecified Bipolar and Related Disorders

This category is used when a person has clear bipolar-like mood changes that do not fit neatly into the other three groups. Examples include short-duration hypomania or hypomanic symptoms without a prior major depressive episode.(1) “Other specified” usually means the clinician can name why full criteria are not met. “Unspecified” is used when there is not enough information yet, such as in an emergency evaluation.

Types of Bipolar Disorder at a Glance

What Is Rapid Cycling Bipolar Disorder?

Rapid cycling is a course specifier, not a separate type of bipolar disorder. It can apply to bipolar I or bipolar II.

Rapid cycling means four or more mood episodes, manic, hypomanic, or depressive, within a 12-month period.(1) The label describes frequency, not a fifth diagnosis.

This cycling bipolar pattern can make diagnosis and treatment more complex. Symptoms may shift before a plan has time to take hold, so closer follow-up and more consistent daily structure are often needed.

How Is Bipolar Disorder Diagnosed?

There is no lab test for bipolar disorder. Diagnosis is based on a clinical evaluation against APA/DSM-5 criteria: a detailed history of energy, sleep, thinking, behavior, and how long each pattern lasted.(1)(2) A physical exam and labs are often used to rule out look-alike causes such as thyroid disease or substance effects.(3)

Diagnosing bipolar type takes a careful timeline because depressive episodes are easy to see and hypomania is easy to miss. Bipolar diagnosing is also harder when mania includes psychosis, which can look like another mental health condition.

This article is educational. Only a qualified mental health clinician can diagnose bipolar disorder or determine which type applies. A second mental health opinion can help when the history is mixed or when prior treatment targeted depression alone.

Symptoms Across the Bipolar Spectrum

Symptoms vary by type and by episode, but many people recognize some combination of the following mental health symptoms.(1)(3)

Manic or hypomanic symptoms

• Feeling unusually up, elated, wired, or highly irritable
• Needing much less sleep without feeling tired
• Talking faster than usual or feeling pressure to keep talking
• Racing thoughts or a flight of ideas
• Increased activity, restlessness, or starting many projects at once
• Inflated confidence or feeling unusually powerful
• Impulsive decisions with a high chance of painful consequences (spending, driving, sex, business)
• In mania only: marked impairment, psychosis, or a need for hospital care

Depressive symptoms

• Persistent sad, empty, or hopeless mood
• Loss of interest in nearly all activities
• Fatigue or feeling slowed down
• Sleeping too little or too much
• Trouble concentrating or making even small decisions
• Feelings of worthlessness or excessive guilt
• Thoughts of death or suicide

If you or a loved one is in immediate danger, call or text 988 in the United States, or go to the nearest emergency room.

Living With Bipolar Disorder: Treatment and Support

Bipolar disorder is usually a long-term condition, but it is treatable. Across types, mental health care commonly includes three parts working together:(1)(3)

Medication: often a mood stabilizer and, when needed, other psychiatric medications coordinated by a prescriber

Therapy: such as cognitive behavioral therapy, interpersonal and social rhythm therapy, or family-focused therapy

Lifestyle and routine management: especially regular sleep, medication consistency, and a predictable daily schedule that supports both mental health and physical health

With the right treatment and support, many people manage their symptoms and keep a full daily routine. Some stabilize in outpatient mental health care. Others have episodes severe or frequent enough that extra day-to-day structure becomes part of staying well.(3)

Explore Brookside Farm’s care programs to see how structured daily support can sit alongside clinical mental health treatment and coordinated health care.

When Might Residential Support Help With Bipolar Disorder?

When episodes are frequent, severe, or difficult to stabilize, ongoing functional and mental health needs help determine whether additional support would help. Outpatient care is enough for many adults. It may not be enough when symptoms keep undoing progress between visits.

Potential signs that a higher level of support may be worth discussing include:

• Frequent or severe mood episodes that interfere with daily functioning
• Difficulty maintaining medication routines
• Repeated psychiatric crises or hospitalizations
• Significant disruption to work, relationships, or safety
• Family caregivers who can no longer sustainably provide the necessary level of support

For appropriately matched adults, structured residential care can add what a clinic visit cannot: a predictable daily routine, 24/7 support, medication coordination, individual and group therapy, life-skills development, and communication with outside health care providers. That kind of environment is one of the residential treatment centers for bipolar disorder families look for when home-based mental health care is no longer holding.

Brookside Farm is a licensed residential setting in Manor, Texas, for adults 21 and older who need greater structure and support. The setting is home-like, with gentle structure, medication supervision, and skill-building so mental health care and daily life stay connected. Learn more about bipolar disorder care at Brookside Farm, or contact the admissions team to discuss current support needs.

References

1. National Institute of Mental Health. Bipolar Disorder. https://www.nimh.nih.gov/health/topics/bipolar-disorder
2. American Psychiatric Association. Bipolar Disorders. https://www.psychiatry.org/patients-families/bipolar-disorders
3. National Alliance on Mental Illness. Bipolar Disorder. https://www.nami.org/about-mental-illness/mental-health-conditions/bipolar-disorder/

Ethan Morrison

Administrator 

Brookside Farm

brookside-farm.org