What is bipolar disorder?
Bipolar disorder is a mood disorder that causes distinct episodes of unusually high or irritable mood, increased energy and changes in activity, along with episodes of depression in many people. The shifts are more than ordinary ups and downs. They are sustained changes from a person’s usual baseline and can affect sleep, judgment, relationships, work and safety.
The defining feature is a history of mania or hypomania. Depression alone does not make a person bipolar. In fact, someone with bipolar disorder may first seek help during a depressive episode and not recognize earlier periods of unusually high energy as symptoms. That is why bipolar disorder can sometimes be mistaken for major depressive disorder.
Bipolar disorders are part of the broader family of mood disorders. They can include severe depression, but treatment is different because medications that are commonly used for unipolar depression may need to be handled differently when mania or hypomania is part of the history.
What is mania?
Mania is a period of abnormally elevated, expansive or irritable mood and increased energy or activity that is severe enough to cause major impairment, require hospitalization or include psychotic symptoms. A manic episode typically lasts at least a week unless hospitalization is needed sooner.
Mania does not always look happy. A person may be intensely irritable, agitated or confrontational. What matters is the change in mood and energy along with other symptoms such as needing much less sleep, talking rapidly, racing thoughts, inflated confidence and risky behavior.
What is hypomania?
Hypomania involves similar symptoms but is less severe. It causes a clear change from usual behavior but does not create the same level of impairment as mania and does not include psychosis. Because a hypomanic period can feel productive, social or energizing, the person may not see it as a problem even when friends or family notice a major shift.
Types of bipolar disorder
- Bipolar I disorder. Defined by at least one manic episode. Depressive episodes are common but are not required for the diagnosis.
- Bipolar II disorder. Involves a pattern of hypomanic episodes and major depressive episodes without a history of full mania.
- Cyclothymic disorder. Involves chronic periods of hypomanic and depressive symptoms that do not meet the full criteria for those episodes.
Other specified or unspecified bipolar and related disorders may be diagnosed when symptoms clearly fall within the bipolar spectrum but do not fit one of the main patterns exactly.
Signs and symptoms of bipolar disorder
Bipolar disorder is diagnosed by patterns over time, not by one emotional moment. A person may move through manic, hypomanic, depressive and relatively stable periods. Some episodes include “mixed features,” meaning symptoms of depression and mania occur at the same time.
Signs of mania or hypomania
- Much less need for sleep. A person may sleep only a few hours and still feel unusually energized.
- Rapid or increased speech. Talking may become difficult to interrupt, and topics may shift quickly.
- Racing thoughts. Ideas can arrive so quickly that concentration becomes difficult.
- Increased activity. The person may take on many projects, socialize much more or become extremely driven.
- Inflated confidence or grandiosity. They may feel unusually powerful, talented, wealthy, important or invulnerable.
- Distractibility. Attention may jump constantly to new ideas or stimuli.
- Risky or impulsive behavior. Spending, sex, substance use, driving, business decisions or confrontations may become unusually reckless.
- Irritability or agitation. Mania is not always euphoric. It can be angry, tense and volatile.
Signs of a depressive episode
Bipolar depression can look nearly identical to other major depressive episodes. Symptoms can include:
- persistent sadness, emptiness or hopelessness;
- loss of interest or pleasure;
- sleeping too much or too little;
- low energy;
- changes in appetite;
- difficulty concentrating or making decisions;
- feelings of guilt or worthlessness;
- thoughts of death or suicide.
Mixed features can be especially distressing
Some people experience depressive symptoms while also feeling agitated, restless, wired or unable to sleep. This combination can be confusing because the person may feel profoundly hopeless while also having increased energy or impulsivity. Mixed symptoms deserve prompt clinical attention, especially when suicidal thoughts are present.
Other conditions can occur at the same time
Anxiety disorders, ADHD, eating disorders and substance use problems can occur alongside bipolar disorder. Alcohol or drug use may worsen mood instability, interfere with medication or become a separate addiction concern.
Diagnosis and tests
There is no blood test or brain scan that confirms bipolar disorder. Diagnosis depends on the person’s history of mood episodes over time, including the severity, duration and effect of symptoms on functioning.
A mental health professional may ask about sleep, energy, speech, impulsive behavior, periods of unusual confidence, depression, psychotic symptoms, substance use and family history. Information from a partner or family member can sometimes be useful because mania or hypomania may be more obvious to other people than to the person experiencing it.
Why bipolar disorder can be missed
Depression is often painful enough to bring someone into treatment. Hypomania may not be. If a person remembers those periods as the times when they were at their best, they may never mention them unless specifically asked. As a result, bipolar II disorder can go unrecognized for years.
Misdiagnosis can also happen because mania can resemble ADHD, substance effects, anxiety or other psychiatric conditions. Psychotic symptoms during severe mood episodes can be confused with schizophrenia-spectrum disorders if the timing of the psychosis and mood symptoms is not understood.
Medical and substance-related causes
Thyroid disease and some other medical conditions can produce symptoms that resemble mania or depression. Prescription medications, stimulants, recreational drugs and withdrawal can also trigger or imitate mood symptoms. A provider may perform a physical exam and order laboratory testing based on the history.
Screening tools
Questionnaires such as the Mood Disorder Questionnaire can help identify whether a more detailed bipolar evaluation is needed. A positive screen is not a diagnosis, and a negative screen does not completely rule bipolar disorder out. The full history remains the most important part of the assessment.
Treatment for bipolar disorder
Bipolar disorder usually requires long-term treatment. The goal is not only to stop the current episode, but also to reduce the frequency and severity of future episodes and help the person maintain stable functioning between them.
Medication
Mood stabilizers and atypical antipsychotic medications are common parts of bipolar treatment. Lithium, valproate and several atypical antipsychotics may be used depending on whether the person is experiencing mania, bipolar depression or maintenance treatment between episodes.
Different medications may be chosen for different phases of the illness. Finding the right plan can take time, and medication monitoring may include blood tests or checks for physical side effects.
Why antidepressants are handled carefully
Antidepressants may sometimes be used for bipolar depression, but they are generally not used alone because they can trigger mania or rapid cycling in some people. This is one reason it is important to tell a clinician about any past periods of unusually high energy or reduced need for sleep before starting treatment for depression.
Psychotherapy
Psychotherapy can help people recognize early signs of mood episodes, improve medication adherence, manage stress and repair relationships affected by episodes. Interpersonal and social rhythm therapy pays particular attention to routines, sleep and daily rhythms. Family-focused therapy can help families understand the illness and communicate more effectively.
Therapy can be extremely useful, but for most people with bipolar disorder it is used alongside medication rather than as a substitute for it.
ECT and other treatments
Electroconvulsive therapy (ECT) may be considered for severe mania, severe bipolar depression, catatonia or situations where a rapid response is needed because of suicide risk or inability to function safely. Transcranial magnetic stimulation (TMS) may also be considered for some depressive symptoms.
Some people with bipolar disorder experience seasonal worsening of depression. Bright-light therapy can sometimes be used, but because activating treatments can affect mood stability, it should be discussed with a clinician familiar with bipolar disorder. Our article on seasonal affective disorder explains seasonal patterns in more detail.
Sleep and routine are part of treatment
Sleep loss can trigger or worsen mood episodes. Keeping a reasonably consistent sleep schedule, avoiding recreational drugs and limiting alcohol can support treatment. Mood tracking can also help identify changes before they become severe.
Outlook
Bipolar disorder is generally a lifelong condition, but that does not mean a person will always be in an episode. Many people have long stretches of stable mood and functioning between episodes, especially with consistent treatment.
The course varies. Some people have relatively infrequent episodes. Others experience more frequent or severe mood changes. Early diagnosis, medication adherence, regular sleep and attention to substance use can all make episodes easier to manage.
Stopping treatment when you feel well can be risky
Feeling stable is often evidence that treatment is working, not proof that the diagnosis disappeared. Stopping medication abruptly can increase the risk of relapse or withdrawal effects. Any medication change should be planned with the prescribing clinician.
Suicide risk deserves direct attention
Bipolar disorder is associated with a meaningful risk of suicide, particularly during depressive or mixed states. If thoughts of suicide are present, our article on suicide and suicidal thoughts explains warning signs and support options. In the United States, call or text 988 for immediate crisis support.
Living with bipolar disorder
One of the hardest parts of bipolar disorder is learning not to judge every strong emotion as a symptom while also taking meaningful changes seriously. You are still allowed to be excited, angry, ambitious, tired or sad. The goal is to learn your own patterns well enough to notice when the intensity, duration and behavior around a mood are moving outside your usual range.
Know your early warning signs
Your first signs may be subtle: sleeping an hour less each night, buying more than usual, texting everyone at 2 a.m., withdrawing from friends or becoming unusually certain about a new plan. Write those signs down when you are stable. It is much harder to define them accurately in the middle of an episode.
Create a plan for mania before mania arrives
A practical plan can include who is allowed to contact your provider, how to protect access to large amounts of money, what to do if sleep drops sharply and which behaviors have signaled danger in the past. Planning ahead is not giving someone control over your life. It is choosing safeguards while your judgment is clear.
Support without confrontation when possible
If you are helping someone who appears manic, arguing about whether every belief is rational may not get you very far. Focus on safety, sleep, medication, contacting the treatment team and reducing access to immediate risks. If psychosis, severe agitation or dangerous behavior is present, emergency evaluation may be necessary.
Do not reduce the person to the diagnosis
Bipolar disorder can explain episodes. It does not explain every decision, personality trait or disagreement. People with bipolar disorder deserve the same thing everyone does: to have their illness taken seriously without having every part of their identity swallowed by it.
A note from Project Semicolon
Bipolar disorder can make you distrust both ends of your emotional range. After a severe episode, you may wonder whether happiness is safe, whether ambition is a warning sign or whether sadness means another crash is starting. That uncertainty can be exhausting.
Stability does not mean becoming emotionally flat. It means learning your own baseline, building treatment around it and having enough support to notice when an episode is beginning to pull you away from yourself. You are not required to fear every good day. With the right care, good days can simply be good days again.
