Bipolar disorder symptoms: manic and depressive episodes, types I and II, causes and treatment

CareOps editorial team · October 28, 2026 · 10 min read

Mental wellness information and service guidance published by CareOps.

For a few days you barely sleep yet don't feel tired, thoughts pour out without pause and it feels like you could do anything. Then, weeks later, even getting out of bed feels too much. This is the pattern often called manic depression, now known as bipolar disorder. Here is what it is, what the symptoms look like, how it differs from ordinary mood swings and how it is treated.

What is bipolar disorder? Is it the same as manic depression? #

Yes. Bipolar disorder was formerly called manic-depressive illness or manic depression; in Korean, the everyday word combines “mania” and “depression.” The U.S. National Institute of Mental Health (NIMH) describes bipolar disorder as a mental illness that causes clear shifts in mood, energy, activity levels and concentration. Very elevated or irritable periods are called manic episodes, and very low, hopeless periods are called depressive episodes.

Everyone has ups and downs, but in bipolar disorder the range can be extreme. Symptoms usually begin in late adolescence or early adulthood, and between episodes mood often returns to a person's usual baseline. A 2016 review in The Lancet (Grande and colleagues) noted that bipolar disorder affects more than 1% of the world's population.

Bipolar disorder symptoms: manic, hypomanic and depressive episodes #

Here are the symptoms NIMH lists, grouped by type of episode. Having one or two does not mean bipolar disorder. What matters is whether these changes appear together, for several days or more, and differ from your usual self.

Here is a closer look at what NIMH lists for a manic episode.

• Mood: very up, high or elated, or extremely irritable and touchy.
• Sleep: little sleep without feeling tired; feeling less need for sleep.
• Thoughts and speech: racing thoughts and talking fast about many different things.
• Activity: much more active than usual, feeling able to do many things at once without tiring.
• Confidence: feeling unusually important, talented or powerful.
• Impulses: an excessive appetite for food, drinking, sex or other pleasurable activities.

A depressive episode looks much like depression: low mood, losing interest in almost everything, trouble concentrating or deciding, sleeping too little or too much, feeling worthless or thinking about death. The signs are covered in early signs of depression. Some people have mixed episodes, with elevated and depressive symptoms at the same time.

What is the difference between bipolar I and bipolar II? #

Clinicians separate types by how severe and how long the elevated periods were. NIMH describes the basic types below.

When hypomanic and depressive symptoms keep recurring but are not intense or long enough to count as episodes, it is called cyclothymic disorder (cyclothymia). In bipolar II especially, people often feel good and productive during hypomania and don't sense anything is wrong, so some live with it believing they only have depression.

How is bipolar disorder different from mood swings? #

Mood that rises and falls several times a day is not bipolar disorder on its own. Bigger mood swings when you're short on sleep, worn out, stressed or before a period are common. The difference lies in how long the change lasts and how much of life it reaches.

For handling ups and downs within a day, see when mood swings get strong. Writing down the days your mood shifts makes it much easier to describe the pattern to a doctor; see keeping an emotion diary for how.

What causes bipolar disorder? #

NIMH says the exact cause of bipolar disorder is unknown, but research suggests a combination of factors may contribute.

• Genetics: it often runs in families, mostly explained by heredity. Many genes are involved and no single gene causes it. One identical twin can develop it while the other does not, and not everyone with a parent or sibling who has it will develop it.
• Highly stressful events: research suggests people with a genetic risk may be more likely to develop it after trauma or other stressful life events.
• Brain structure and function: research suggests these may differ in people with bipolar disorder.
• Other causes of similar symptoms: thyroid disease and some medications or substances can mimic or worsen mood symptoms, so a clinician may check your physical health first.

Sleep is worth watching less as a cause and more as one of the earliest visible signs. “Decreased need for sleep” is on the list of manic symptoms, and one of the therapies NIMH describes works on a person's biological and daily rhythms. If you're going to bed later and later yet feel full of energy, write that change down.

A bipolar self-check: looking at recent elevated mood #

The CareOps elevated mood and activity check (ASRM) is based on a five-item scale published by Altman and colleagues in 1997. It looks at the past week: whether you felt happier than usual, more confident, needed less sleep, talked more or were more active. It screens for manic symptoms and is not a diagnosis. Answer by comparing yourself with your usual self, not with a naturally lively personality. You can take it right away, with no login.

Looking at the low side as well shows the pattern more clearly. The 2016 Lancet review notes that bipolar disorder most often begins with a depressive episode and looks like depression, which makes diagnosis hard, so finding hypomanic periods and following symptoms over time are crucial. If you seek care for depression, also mention any past periods when you felt elevated despite barely sleeping.

Bipolar disorder treatment: medication, psychotherapy and daily rhythm #

According to NIMH, bipolar disorder usually requires long-term treatment, but the right treatment can help manage symptoms and improve quality of life. Medication is central, used together with psychotherapy, and which medication to use is decided with your doctor. NIMH explains that using medication for depression on its own can trigger a manic episode, which is why it matters to tell your doctor about any elevated periods. If you want to reduce or stop medication, talk with your doctor first.

The psychotherapies NIMH describes as helpful alongside medication include interpersonal and social rhythm therapy, which works on biological and daily rhythms; family-focused therapy; and cognitive behavioral therapy (CBT) for depression. CBT adapted for insomnia can be especially helpful as part of treating bipolar depression. For an overview of treatment, see how to treat depression; if you're hesitant about seeing a psychiatrist, see psychiatric records.

1. Keep regular sleep and wake times: try not to drift far from them even on weekends.
2. Note mood, sleep and activity in one line each day: seeing whether shorter sleep moves with higher mood and activity makes it easier to explain at appointments.
3. Delay big decisions on elevated days: before spending large sums or making major choices, wait a day and look again with someone you trust.
4. Cut back on alcohol: it disrupts sleep and can make mood swing harder.
5. Make a plan with someone close: agree on which signs they should point out, since others may notice before you do.

If you want help making sense of the ups and downs #

Alongside medical care, having a place to talk through the days your mood rose and fell helps the pattern come into focus. CareOps Maeumi is an AI counseling app that runs sessions with approaches such as cognitive behavioral therapy (CBT) and acceptance and commitment therapy (ACT). It helps you look at the thoughts on low days and remembers past sessions, so you can keep following your sleep and mood pattern in the next one. Get the app

This guide shares mental wellness information. If you are in immediate danger, contact emergency services where you are. Support and contact information.