What Is Bipolar Disorder? Types, Symptoms, and Why the Highs Matter as Much as the Lows

Maybe you’ve had stretches where you barely slept and felt unstoppable, followed by weeks when getting out of bed felt impossible. Or maybe you’ve only ever asked for help with the lows, and no one asked about the highs. If either sounds familiar, the questions you’re carrying deserve a careful answer.

Your brain keeps mood, energy, sleep, and activity within a working range, a bit like a thermostat holding a room’s temperature. NIMH’s bipolar disorder guide describes bipolar disorder as an illness that pushes those systems far outside that range in both directions: manic or hypomanic episodes of elevated or irritable mood and high energy, and depressive episodes of low mood and very low activity. Getting the diagnosis right takes precision, because NIMH notes it rests on the severity, length, and frequency of symptoms over a lifetime, not just on how someone feels today.

The standard treatment is well established. NIMH lists mood stabilizers, such as lithium or valproate, and atypical antipsychotics as the most commonly prescribed medications, often paired with psychotherapy. A BMJ meta-analysis of 48 randomized trials found that lithium reduced the odds of suicide compared with placebo in people with mood disorders. The results are real, and the science is well established.

Those treatments work once the diagnosis is right, but bipolar disorder often goes unrecognized for years, and at Siggy we think the most important bipolar care starts before a single prescription is written.

Better care starts with a full mood history. That means asking about the highs as carefully as the lows, checking family history, and screening for bipolar disorder before any antidepressant is considered. It protects the same brain systems the standard treatments target, at the moment a missed diagnosis can do the most harm, because NIMH warns that treating a first depressive episode with an antidepressant alone can trigger mania. The difference is clinical rather than cosmetic.

What This Page Covers

• What Is Bipolar Disorder?
• What Are the Types of Bipolar Disorder?
• What Does a Manic or Hypomanic Episode Feel Like?
• What Does Bipolar Depression Feel Like?
• Why Is Bipolar Disorder So Often Missed?
• Why Do Antidepressants Need Extra Caution?
• How Is Bipolar Disorder Treated?
• What Can You Do Between Appointments?
• How Siggy Fits In
• Tell the Whole Story of Your Moods

What Is Bipolar Disorder?

Bipolar disorder, once called manic depression, is a mental illness marked by clear shifts in mood, energy, activity, and concentration. NIMH explains that symptoms usually start in late adolescence or early adulthood, that episodes typically last a week or two or longer, and that mood often returns to a healthy baseline in between. Without adequate treatment, episodes can come more often over time.

It’s less common than depression, but it hits hard. According to NIMH’s bipolar disorder statistics, about 2.8% of U.S. adults had bipolar disorder in the past year, and 4.4% will at some point. Of adults with bipolar disorder in the past year, 82.9% had serious impairment, the highest share among mood disorders.

Bipolar disorder usually requires lifelong treatment and doesn’t go away on its own. The encouraging part is that NIMH describes treatment as helpful for many people, even those with the most severe forms.

What Are the Types of Bipolar Disorder?

NIMH describes three basic types, defined by how high the highs go and how the lows show up:

Type	The Highs	The Lows	What Stands Out
Bipolar I	Mania for 7+ days, or needing hospital care	Depressive episodes, usually 2+ weeks	Full manic episodes
Bipolar II	Hypomania, milder than mania	Depressive episodes	Long stretches of low-grade depression
Cyclothymic disorder	Hypomanic symptoms below episode level	Depressive symptoms below episode level	Recurring, milder cycling

NIMH adds that four or more episodes of mania or depression in a year is called rapid cycling, and that symptoms that don’t fit these three patterns may be diagnosed as other specified or unspecified bipolar disorder. Our guide to bipolar I vs. bipolar II goes deeper on the difference that matters most for treatment.

What Does a Manic or Hypomanic Episode Feel Like?

Mania is more than a good mood. NIMH describes feeling very up, elated, or extremely irritable, feeling jumpy or wired, racing thoughts, a decreased need for sleep, talking fast about many topics, and feeling unusually important, talented, or powerful. People may feel able to do many things at once without tiring, or chase pleasure in ways that make it hard to keep up with work, social life, or relationships. Severe episodes can include psychosis, such as hallucinations or false beliefs.

Hypomania is the milder version, and it’s easy to miss from the inside. NIMH notes that hypomania can make someone feel very good and productive, so they may not feel anything is wrong, while family and friends notice the change. Our guides to what a manic episode feels like and hypomania vs. mania describe the experience in more detail.

What Does Bipolar Depression Feel Like?

The depressive side looks a lot like major depression. NIMH lists feeling very down, sad, or anxious, feeling slowed down or restless, trouble concentrating, sleeping too much or too little, losing interest in almost everything, and feeling hopeless or worthless, sometimes with thoughts of death or suicide.

That overlap is exactly why bipolar disorder gets missed. Someone seeking help during a low may describe only depression, and a clinician who doesn’t ask about past highs may never hear about them. Our guide to bipolar depression vs. depression covers the clues that set them apart.

Why Is Bipolar Disorder So Often Missed?

The gap between first symptoms and first care is long. A 2017 meta-analysis pooled 27 studies with 9,415 patients and found an average interval of 5.8 years between the onset of bipolar disorder and its first management.

NIMH points to several reasons. People with bipolar II may seek help only for depression while hypomanic episodes go unnoticed. People with psychotic symptoms during mood episodes can be misdiagnosed with schizophrenia. Thyroid disease and some medications or drugs can mimic or worsen mood symptoms. NIMH’s advice is to look at the course of symptoms over time rather than only the current picture.

Many people also have other conditions alongside bipolar disorder, including anxiety disorders, ADHD, substance misuse, or eating disorders, which can make the pattern harder to see.

Why Do Antidepressants Need Extra Caution?

When depression is really bipolar depression, an antidepressant on its own can backfire. NIMH warns that if subtle signs of bipolar disorder are missed and a first depressive episode is treated with an antidepressant alone, a manic episode or rapid cycling may follow.

The research backs this up. A Swedish national registry study followed 3,240 people with bipolar disorder who started an antidepressant. Nearly 35% were on an antidepressant without a mood stabilizer, and in that group the risk of mania roughly tripled in the following three months. People who took an antidepressant together with a mood stabilizer showed no rise in mania risk over that period.

That’s why it matters for clinicians to ask about personal and family history of mania or hypomania before treating depression. If you’ve ever had a stretch of unusually high energy and little need for sleep, it’s worth saying so, even if it felt good at the time.

How Is Bipolar Disorder Treated?

Treatment usually combines medication and psychotherapy, and NIMH notes that some people need to try several medications before finding the right fit. Mood stabilizers such as lithium or valproate can help prevent episodes or reduce their severity, and atypical antipsychotics are also common. The 2018 CANMAT and ISBD guidelines list lithium, quetiapine, divalproex, lamotrigine, asenapine, and aripiprazole among first-line options for maintenance treatment in bipolar I.

Lithium has a distinctive benefit. In the BMJ meta-analysis, lithium cut the odds of suicide compared with placebo, with an odds ratio of 0.13. Our guides to lithium for bipolar disorder and bipolar medications explain how these options compare.

Psychotherapy adds real value on top of medication. In a randomized trial from the STEP-BD program, 293 people with bipolar depression received medication plus either intensive psychotherapy or a brief three-session program. Those in intensive therapy had higher recovery rates at one year (64.4% vs. 51.5%) and recovered faster. NIMH highlights interpersonal and social rhythm therapy, family-focused therapy, and CBT adapted for insomnia. For severe or treatment-resistant episodes, options include electroconvulsive therapy and transcranial magnetic stimulation, and light therapy may help seasonal worsening of depression.

What Can You Do Between Appointments?

Day-to-day habits support treatment, though they don’t replace it. NIMH suggests:

• Keeping a steady routine for eating, sleeping, and exercise
• Avoiding alcohol and drugs
• Keeping a life chart or mood journal to spot mood swings early
• Taking medication as directed and keeping appointments
• Asking trusted people to help you stick with treatment

NIMH also cautions against stopping medication without talking to your provider first. Sleep deserves special attention, and our guide to bipolar disorder and sleep explains why.

How Siggy Fits In

Siggy’s licensed prescribers diagnose and treat the full range of mental health conditions, including bipolar disorder. Managing it well usually means mood stabilizers and ongoing care from a prescriber who knows your full mood history.

Where Siggy matters is at the front door. Many people with bipolar disorder first look for help during a depressive episode. The anonymous intake needs no name, email, or account, so you can describe your full mood history, including the highs, without worrying about how it sounds. A licensed prescriber reviews your full intake before anything is prescribed, and your downloadable summary gives a psychiatrist a clear record to start from.

Siggy isn’t an emergency service. If you or someone you love is in a severe manic episode, losing touch with reality, or thinking about suicide, call 911 or call or text 988. This article is for education only and isn’t a substitute for personal medical advice. It reflects sources available as of October 2026.

Tell the Whole Story of Your Moods

Bipolar disorder is serious, common enough to matter, and very treatable once it’s recognized. The single most useful thing you can do is give a clinician the whole story, the highs as well as the lows, and any family history of mood disorders. If mood disorders run in your family, our guide to whether bipolar disorder is hereditary is a good next read. Start your anonymous intake and describe your moods, sleep, and energy over time in your own words. It’s free, a real doctor reviews every clinical decision, and the summary is yours to share with whoever helps you next.