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Bipolar Disorder: Symptoms, Types, and Treatment

Bipolar disorder is a brain-based condition that causes shifts between episodes of mania or hypomania and episodes of depression, with stretches of stable mood in between.

Bipolar Disorder: Symptoms, Types, and Treatment
Mental HealthBipolar Disordermanagement
Written By: DocAi Health Editorial Team
Last Updated: 2026-08-25
Medically Reviewed By: DocAi Health Medical Review Team
Medical Disclaimer: This article is for general informational and educational purposes only and is not medical advice. It does not create a doctor-patient relationship and is not a substitute for professional diagnosis or treatment by a qualified healthcare provider. Never disregard or delay seeking professional medical advice because of something you have read here. If you think you may have a medical emergency, call 911 or your local emergency number right away. Health information can change and this guidance is general and US-focused, so consult a licensed clinician in your own country about your specific situation.
Bipolar disorder is a brain-based condition that causes shifts between episodes of mania or hypomania and episodes of depression, with stretches of stable mood in between. It usually starts in the late teens or early twenties and tends to be a lifelong condition, though mood episodes can be managed with medication, therapy, and routine. What makes it different from ordinary mood swings is the intensity and duration: a manic episode can involve days of racing thoughts, little need for sleep, and risky decisions, while a depressive episode can bring weeks of exhaustion and hopelessness. This article covers the main types, how episodes present, how doctors diagnose the condition, and what treatment usually involves.

What Bipolar Disorder Is

Bipolar disorder changes how the brain regulates mood, energy, and activity level. Instead of a steady baseline, a person cycles through distinct episodes that each last days to weeks, separated by periods where mood returns closer to normal. The condition runs in families and involves differences in brain chemistry and structure, though no single cause explains every case. Stress, sleep disruption, and substance use can trigger an episode in someone who already has the underlying vulnerability, but they do not cause bipolar disorder on their own.
The core feature that separates bipolar disorder from major depressive disorder is the presence of mania or hypomania at some point in the person's life. Someone who has only ever had depressive episodes, without a manic or hypomanic episode, does not have bipolar disorder even if the depression is severe and recurring. For more on depression without the manic component, see our Major Depressive Disorder article.

The Types of Bipolar Disorder

Bipolar I Disorder

Bipolar I is defined by at least one full manic episode lasting a week or longer, or severe enough to require hospitalization. Depressive episodes are common but not required for diagnosis. Mania at this level can include grandiose beliefs, extreme irritability, and impulsive decisions such as large purchases or unprotected sex, and it can involve psychotic symptoms like delusions or hallucinations in severe cases.

Bipolar II Disorder

Bipolar II involves at least one hypomanic episode and at least one major depressive episode, but no full manic episode. Hypomania is a less intense version of mania: energy and mood are noticeably higher for at least four days, but the person can usually still function at work or with family, and hospitalization is not needed. Because the depressive episodes in bipolar II can be long and severe, this type is sometimes mistaken for major depressive disorder until a hypomanic episode is recognized.

Cyclothymic Disorder

Cyclothymic disorder involves numerous periods of hypomanic symptoms and numerous periods of depressive symptoms over at least two years, none of which are severe or long enough to meet full criteria for a hypomanic or depressive episode. Mood stays unpredictable and mildly disrupted much of the time rather than swinging into the extremes seen in bipolar I or II.

Other Specified and Unspecified Bipolar Disorders

Some people have manic and depressive symptoms that cause real distress or impairment but do not fit neatly into the timing or severity thresholds above, for example a hypomanic episode lasting only two or three days. These are diagnosed as other specified or unspecified bipolar disorder and are treated with the same seriousness as the named types.

Symptoms of a Manic or Hypomanic Episode

During mania or hypomania, mood is unusually high, expansive, or irritable, and this shift is accompanied by a burst of energy and activity that is out of character. Common symptoms include a reduced need for sleep without feeling tired, talking faster or more than usual, racing thoughts, being easily distracted, taking on many projects at once, and poor judgment about risk. A person in a manic episode might spend money they do not have, start several businesses in a week, or drive recklessly, and they often do not see these choices as a problem while it is happening. Family members frequently notice the change before the person does.

Symptoms of a Depressive Episode

The depressive side of bipolar disorder looks similar to major depressive disorder: low mood or loss of interest most of the day nearly every day, changes in sleep and appetite, low energy, trouble concentrating, feelings of worthlessness or guilt, and in some cases thoughts of death or suicide. A depressive episode in bipolar disorder tends to be treated cautiously because certain antidepressants, if given without a mood stabilizer, can trigger a switch into mania in someone with bipolar disorder.

How Bipolar Disorder Is Diagnosed

Diagnosis is made through a clinical interview with a psychiatrist or other trained mental health professional, not a blood test or brain scan. The clinician asks about the timing, length, and severity of past mood episodes, often going back years, and talks with family members when helpful, since the person may not remember or recognize a past manic episode clearly. Blood work and sometimes imaging are used to rule out other causes of mood changes, such as thyroid disease or substance use, rather than to confirm bipolar disorder itself. Because early episodes can look like plain depression or anxiety, an accurate diagnosis sometimes takes several years and more than one evaluation.

Treatment Approaches

Treatment usually combines medication with psychotherapy and lifestyle structure, and it is typically ongoing rather than a short course. Mood stabilizers such as lithium, along with certain anticonvulsants and atypical antipsychotics, are the backbone of treatment and are used to prevent future manic and depressive episodes rather than only to treat whichever episode is happening now. Antidepressants are used cautiously and almost always alongside a mood stabilizer, because used alone they carry a risk of triggering mania in someone with bipolar disorder.
Psychotherapy, particularly cognitive behavioral therapy and family-focused therapy, helps people recognize early warning signs of an episode, manage stress, and keep relationships steady during mood shifts. Consistent sleep and daily routine matter more in bipolar disorder than in most other mental health conditions, since sleep loss is one of the most common triggers for a manic episode. Many people also keep a mood chart to track sleep, mood, and energy day to day, which helps both the person and their clinician spot a developing episode early, when it is easier to manage.
Alcohol and recreational drug use are discouraged because they can trigger episodes and interfere with medication. Building a plan with a psychiatrist for what to do at the first signs of mania, such as who to call and whether a short course of an added medication is appropriate, can prevent a full episode from developing.

Rapid Cycling and Mixed Episodes

Some people with bipolar disorder experience rapid cycling, defined as four or more distinct mood episodes within a single year. Rapid cycling can make the condition harder to treat and often prompts a closer look at contributing factors such as thyroid problems, certain medications, or inconsistent sleep. Mixed episodes are another pattern worth knowing about: symptoms of mania and depression occur at the same time, so a person might feel hopeless and worthless while also having racing thoughts and little need for sleep. Mixed episodes carry a higher risk of impulsive self-harm because the low mood of depression combines with the energy and impulsivity of mania, and they are treated as a priority for close follow-up.

Bipolar Disorder and Co-occurring Conditions

Bipolar disorder frequently occurs alongside other conditions, which can make both diagnosis and treatment more complicated. Anxiety disorders are common in people with bipolar disorder, and untreated anxiety can make mood episodes harder to manage. Substance use disorders also occur at a higher rate in people with bipolar disorder, partly because alcohol or drugs are sometimes used to cope with the discomfort of a mood episode, which in turn tends to make episodes more frequent and more severe. Attention-deficit/hyperactivity disorder can overlap with bipolar disorder as well, particularly in younger patients, and distinguishing the two requires attention to whether high energy and distractibility come in distinct episodes or are present more or less constantly. A thorough evaluation accounts for these overlapping conditions rather than treating bipolar disorder in isolation.

Living With Bipolar Disorder

With consistent treatment, many people with bipolar disorder work, maintain relationships, and go long stretches between episodes. Stopping medication once mood feels stable is one of the most common reasons for relapse, since the medication is what is keeping mood stable in the first place. A support network that understands the condition, whether family, friends, or a support group, makes it easier to catch early warning signs and stay on treatment during a period when insight into one's own mood is exactly what is impaired.

When to Seek Medical Care

When to Seek Urgent or Emergency Care

Most manic and depressive episodes are managed with an outpatient treatment plan, but some presentations of bipolar disorder can turn dangerous quickly and need emergency evaluation. This guidance is in addition to, not a replacement for, the general disclaimer above.

Emergency, call 911 or go to the emergency room immediately if:

  • You or someone you know is thinking about suicide, has a plan, or has attempted to harm themselves. Call 911 or the 988 Suicide and Crisis Lifeline (call or text 988) right away.
  • Someone is experiencing psychosis during a manic episode, such as hearing voices, believing they have special powers, or acting on delusions that put them or others at risk.
  • A person in a manic episode is behaving in a way that is putting their safety at immediate risk, such as extreme reckless driving, going days without sleep or food, or aggressive and violent behavior toward others.
  • Someone has taken more than the prescribed amount of a mood stabilizer, antipsychotic, or other psychiatric medication, whether intentionally or by accident. Call 911 or Poison Control at 1-800-222-1222.
  • A person is severely dehydrated, disoriented, or physically unwell after days of not eating, drinking, or sleeping during a manic episode.

See a doctor soon (same-day or next available appointment) if:

  • You notice the early signs of a manic episode starting, such as sleeping much less than usual without feeling tired, racing thoughts, or unusually high mood or irritability.
  • A depressive episode is deepening, with worsening sleep, appetite, energy, or ability to function at work or home, even without thoughts of self-harm.
  • Side effects from a mood stabilizer or other psychiatric medication, such as tremor, significant weight change, or unusual fatigue, are becoming hard to manage.
  • You have stopped taking a prescribed mood stabilizer or antipsychotic and want to restart or adjust treatment safely rather than on your own.
  • A loved one's mood or behavior has changed in a way that concerns you, even if they do not think anything is wrong.
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Frequently Asked Questions

Can bipolar disorder go away on its own without treatment?

Bipolar disorder is a chronic condition and does not typically resolve permanently on its own. Episodes come and go, and periods of stable mood can last months or years, but the underlying vulnerability to future episodes usually remains. Ongoing treatment with a mood stabilizer and regular follow-up is the main way to reduce how often episodes happen.

What is the difference between bipolar disorder and having mood swings?

Everyday mood swings shift within hours in response to what is happening around a person and do not disrupt sleep, judgment, or daily functioning. A manic or depressive episode in bipolar disorder lasts days to weeks, happens somewhat independently of outside events, and noticeably changes sleep, energy, and decision-making in ways others often notice too.

Can you have bipolar disorder without ever feeling manic?

You can have bipolar II disorder, which involves hypomania rather than full mania. Hypomania is milder and can feel like a good, productive stretch rather than an obvious problem, which is part of why bipolar II is sometimes missed for years and treated as recurring depression instead.

Is bipolar disorder genetic?

Bipolar disorder tends to run in families, and having a parent or sibling with the condition raises the chances of developing it, but genetics is only part of the picture. Many people with a family history never develop bipolar disorder, and some people with no known family history do, so genes are a risk factor rather than a guarantee.

What triggers a manic or depressive episode?

Sleep disruption is one of the most consistent triggers for mania, along with high stress, major life changes, and alcohol or recreational drug use. Depressive episodes can be triggered by similar stressors or can begin without an obvious trigger at all. Stopping medication is a common trigger for either type of episode.

Can someone with bipolar disorder live a normal life?

Many people with bipolar disorder work, raise families, and maintain long relationships, especially with consistent treatment and a stable routine. The condition requires ongoing management rather than a cure, similar to other chronic health conditions, but it does not prevent a full and stable life.

Is bipolar disorder the same as borderline personality disorder?

No. Bipolar disorder involves distinct mood episodes lasting days to weeks, while borderline personality disorder involves mood and relationship instability that shifts much faster, often within the same day, in response to interpersonal situations. The two conditions can sometimes occur together, and a mental health professional can help tell them apart.

Do children get diagnosed with bipolar disorder?

Bipolar disorder can occur in children and teenagers, though it is diagnosed less often in children than in adults and the symptoms can look different, such as more frequent mood changes within a day rather than distinct week-long episodes. Diagnosis in children is made carefully by a child psychiatrist, since several other conditions can look similar.

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