Types of Bipolar Disorder: Signs and Differences Explained

Written by the Lyte Psychiatry clinical team. Clinically reviewed by Ana G., LPC, and medically reviewed by Dr. Akinwande Akintola, MD, supervising physician. Last reviewed: November 4, 2026.

The main types of bipolar disorder are bipolar I, bipolar II and cyclothymic disorder. Bipolar I is defined by full manic episodes; bipolar II by hypomania plus major depression; cyclothymia by milder, recurring ups and downs that never reach a full episode. All three involve clear shifts in mood, energy and activity that go beyond ordinary moodiness, and all three are treatable with ongoing care.

This article is for adults and teens in Texas who have noticed intense mood swings in themselves or a family member, for people who have been told they have "bipolar" without a clear explanation, and for anyone trying to tell the difference between depression and a bipolar condition. It explains the signs, the differences and how diagnosis works.

What is bipolar disorder?

Bipolar disorder is a mood disorder that causes clear shifts in mood, energy, activity levels and concentration, swinging between periods of elevated or irritable mood and periods of depression. The National Institute of Mental Health (NIMH) describes these shifts as distinct from the normal ups and downs most people experience and notes that the condition usually requires lifelong treatment.

MedlinePlus explains that bipolar disorder was formerly called manic depression, that its exact cause is unknown, and that genetics, brain structure and function, and environment all appear to play a role. Having a close relative with the condition raises the risk. Both sources agree on one point: this is a medical condition, not a personality type or a choice.

What are the types of bipolar disorder?

The types of bipolar disorder are distinguished mainly by how severe and how long the "up" episodes are. NIMH's patient publication on bipolar disorder describes three main types, summarized here (page read October 2026):

• Bipolar I disorder: manic episodes that last at least 7 days, or manic symptoms severe enough to need hospital care. Separate depressive episodes usually occur as well, typically lasting at least 2 weeks.
• Bipolar II disorder: a pattern of depressive episodes and hypomanic episodes, without the full-blown mania of bipolar I.
• Cyclothymic disorder (cyclothymia): recurrent hypomanic and depressive symptoms that are not intense enough, or do not last long enough, to qualify as full hypomanic or depressive episodes.

Clinicians also use the label "other specified" or "unspecified" bipolar disorder when symptoms are clearly bipolar in nature but do not fit one of the three patterns. That category exists so that people can get treatment without being forced into a box that does not fit.

What does bipolar I look like?

Bipolar I looks like at least one episode of full mania: a week or more of unusually elevated or irritable mood with a surge of energy that is obvious to other people. NIMH lists manic signs such as feeling very "up" or wired, needing little sleep, talking fast about many things, racing thoughts, feeling unusually important or powerful, and doing risky things that show poor judgment, such as reckless spending.

Example (hypothetical): a 24-year-old stops sleeping for five nights, starts three business ventures in a week, spends his savings on equipment and becomes furious when his family questions him. Two weeks later he cannot get out of bed. That pattern, mania followed by depression, is what clinicians mean by bipolar I. Mania can also include psychosis, such as beliefs that are clearly out of touch with reality, which is one reason it sometimes leads to hospitalization.

What does bipolar II look like?

Bipolar II looks like repeated major depressive episodes punctuated by hypomania, a milder high that rarely leads to hospitalization but is still a change from the person's usual self. NIMH notes that many people with bipolar II spend extended periods in a persistent, low-grade depressive state, which is why the condition is so often first diagnosed as depression.

Hypomania can feel productive: more energy, more confidence, less need for sleep, more talking and more projects. The person may not see it as a problem, and family members may simply be relieved they seem better. The clue is the contrast: a few days of unusual drive followed by weeks of heaviness. Lyte Psychiatry's article on bipolar 2 versus depression walks through how clinicians tell them apart.

What does cyclothymic disorder look like?

Cyclothymic disorder looks like a long-running pattern of mood swings that are milder than bipolar I or II but never quite settle. The highs do not reach full hypomania, and the lows do not reach major depression, yet the person rarely feels steady for long. People with cyclothymia are often described as "moody" or "unpredictable" for years before anyone considers a diagnosis.

Because the symptoms are subtler, cyclothymia is easy to dismiss. It still deserves evaluation: the instability can strain work and relationships, and in some people it precedes a fuller bipolar picture. A mood chart kept over several months is one of the most useful tools for seeing the pattern.

How are the types of bipolar disorder different from ordinary mood swings?

Bipolar episodes differ from ordinary mood swings in duration, intensity and effect on functioning. MedlinePlus notes that most people feel sad or irritable from time to time, but a mood disorder affects your everyday emotional state in a sustained way. A bad week after a breakup is not an episode; a week of needing two hours of sleep and feeling invincible, or a month of being unable to function, may be.

Three questions help draw the line:

• Duration: Does the mood state last days to weeks rather than hours?
• Change from baseline: Do people who know you say you are "not yourself"?
• Consequences: Has the episode affected sleep, money, work, safety or relationships?

How is bipolar disorder diagnosed, step by step?

Bipolar disorder is diagnosed through a careful clinical history, not a single test. Here is what a thorough evaluation usually involves:

1. A timeline of mood episodes, including highs that you may not have thought of as problems.
2. Questions about sleep, energy, spending, risk-taking and irritability during the best and worst periods.
3. Family history of bipolar disorder, depression, suicide or substance use.
4. Medical screening, often including thyroid labs, since medical conditions and some medications can mimic mood episodes.
5. Input from a family member or partner, with your permission, because hypomania is often clearer to others.
6. A working diagnosis and plan, which may be refined as more information comes in.

NIMH recommends keeping a life chart or mood journal to help recognize mood swings, and structuring activities with a routine for eating, sleeping and exercising. Bring that chart to your appointment.

What should I tell my clinician?

Tell your clinician about the highs as well as the lows, since the highs determine the diagnosis. A short checklist to bring:

• "My worst low lasted about [time] and I [could not work / stayed in bed / had thoughts of dying]."
• "There have been stretches where I needed much less sleep and felt unusually energetic or confident."
• "During those stretches I [spent money / took risks / started many projects / got into arguments]."
• "My [relative] has been diagnosed with [bipolar disorder / depression]."
• "I have taken [antidepressants / other medications] and here is what happened."

For help preparing, see what happens at a first psychiatry appointment.

How is bipolar disorder treated?

Bipolar disorder is treated with a combination of medication, psychotherapy and daily routines, adjusted over time by a psychiatric clinician. NIMH explains that mood stabilizers can help prevent mood episodes or reduce their severity, and that psychotherapy offers support, education, skills and strategies to people with bipolar disorder and their families. This article is general information, not a medical recommendation. Do not start, stop or change any medication without talking to your prescriber.

Because treatment is long-term, the relationship with your clinician matters. Lyte Psychiatry's page on medication management describes how ongoing visits work, and the article on what happens at a medication management visit explains what to expect.

When should I get help sooner?

Get help sooner if you or someone you love has not slept for several nights, is spending or taking risks in a way that could cause lasting harm, is hearing or seeing things others do not, or is talking about death or suicide. NIMH advises calling or texting 988, or 911 for immediate danger, in those situations. Mania and severe depression can both become emergencies quickly. Lyte Psychiatry is an outpatient practice and does not provide crisis or after-hours coverage, so use emergency services when safety is at stake.

What should Texans know about bipolar care?

Texans can be evaluated and treated for bipolar disorder in person or by telehealth, as long as the clinician is licensed in Texas and the patient is in Texas during a video visit. Texas's public mental health authorities also run 24/7 crisis lines in every county for emergencies. Telehealth and prescribing rules vary by state, and some medications used for bipolar disorder require regular lab monitoring, so ask your clinician how labs will be handled if you are seen mostly by video.

Getting support in Texas

Lyte Psychiatry offers therapy, psychiatric evaluation and medication management in Texas. In-person visits are available at Lyte Psychiatry's clinic in Pantego, in the Dallas–Fort Worth area, and telehealth visits are available to patients who are physically located in Texas at the time of the visit. Most new patients are seen within 1–2 business days. Weekend appointments are limited. All Lyte Psychiatry services are available in Spanish.

Lyte Psychiatry is an outpatient practice. It does not provide inpatient care, crisis or after-hours coverage, medically supervised detox, or intensive outpatient or partial hospitalization programs. Availability, insurance and clinician fit require confirmation. To ask about an evaluation, contact Lyte Psychiatry.

If you are in a mental-health crisis in the United States, call or text 988. Call 911 for immediate danger.

Educational information, not a diagnosis or individual treatment plan.