Bipolar disorder causes dramatic shifts in mood, energy, and behavior that cycle between emotional highs (mania or hypomania) and lows (depression). These aren’t ordinary mood swings. Manic episodes last at least a week, depressive episodes at least two weeks, and both are intense enough to disrupt daily life, relationships, and work. The specific symptoms depend on which type of episode you’re experiencing and which form of bipolar disorder you have.
Symptoms of a Manic Episode
Mania is the hallmark of bipolar I disorder. It involves a distinct period of abnormally elevated, expansive, or irritable mood combined with a surge in energy or goal-directed activity. These symptoms must be present most of the day, nearly every day, for at least one week to meet the clinical threshold. To qualify as a manic episode, at least three of the following symptoms need to be present (four if the mood is irritable rather than elevated):
- Inflated self-esteem or grandiosity: feeling unusually important, talented, or powerful, sometimes to a delusional degree
- Decreased need for sleep: feeling rested after just two or three hours, or not sleeping at all without feeling tired
- Pressured speech: talking much faster than normal, jumping between topics, being hard to interrupt
- Racing thoughts: ideas moving so quickly it’s hard to keep up or focus on one thing
- Distractibility: attention pulled easily to unimportant things in the environment
- Increased goal-directed activity or agitation: taking on multiple projects at once, pacing, restless physical energy
- Risky behavior: spending sprees, impulsive sexual encounters, reckless driving, or poor business decisions
Mania isn’t always euphoric. Some people experience it primarily as intense irritability or agitation rather than a “high.” During a manic episode, many people don’t recognize that anything is wrong, which is part of what makes it dangerous. The episode is severe enough to cause obvious problems at work, in relationships, or in social situations, and it sometimes requires hospitalization.
Symptoms of a Depressive Episode
Bipolar depression looks similar to major depression, and it’s often the side of the illness people experience most. A depressive episode requires five or more of the following symptoms lasting at least two weeks, with at least one being depressed mood or loss of interest:
- Depressed mood: persistent sadness, emptiness, or hopelessness for most of the day
- Loss of interest or pleasure: activities that used to feel enjoyable no longer do
- Sleep changes: sleeping far more than usual or struggling with insomnia
- Guilt or worthlessness: excessive, inappropriate guilt or a deep sense of being a failure
- Low energy: fatigue or exhaustion that doesn’t improve with rest
- Difficulty concentrating: trouble making decisions, following conversations, or completing tasks
- Appetite changes: significant increase or decrease in appetite, sometimes with noticeable weight changes
- Psychomotor changes: noticeably slowed movements and speech, or visible restlessness and agitation
- Suicidal thoughts: recurring thoughts of death, dying, or self-harm
Bipolar depression tends to be more debilitating than the manic side for many people, partly because depressive episodes often last longer. People frequently spend more total time depressed than manic over the course of the illness. The suicide risk is substantial: between 30% and 60% of people with bipolar disorder make at least one suicide attempt in their lifetime, and roughly 15% to 20% die by suicide.
Hypomania: A Milder Form of Mania
Hypomania involves the same core symptoms as mania but at a lower intensity. The symptoms need to last at least four consecutive days (compared to a full week for mania), and the key distinction is functional impact. Hypomania doesn’t cause major problems at work, school, or home, and it doesn’t require hospitalization. If psychosis is present, such as hallucinations or delusions, the episode is reclassified as mania regardless of severity.
Hypomania can actually feel productive and pleasant. You might feel more creative, social, and energetic than usual. Others around you may notice the change in your behavior even when you feel fine. This is the defining feature of bipolar II disorder: at least one hypomanic episode and at least one major depressive episode, but never a full manic episode. Because hypomania can feel good and doesn’t always cause obvious harm, bipolar II is frequently misdiagnosed as standard depression.
Psychotic Symptoms During Episodes
Psychosis is more common in bipolar disorder than many people realize. A large meta-analysis found that about 48% of people with bipolar I experience psychotic symptoms at some point, and during active manic episodes, that number rises to roughly 57%. These symptoms typically include delusions (strongly held false beliefs) or hallucinations (seeing or hearing things that aren’t there).
During mania, psychotic features often align with the elevated mood. Someone might believe they have special powers, a divine mission, or extraordinary wealth. During depression, psychotic symptoms tend to reflect the low mood, such as believing you’ve committed an unforgivable sin or that you’re dying of an illness. Psychosis during bipolar episodes is temporary and resolves as the mood episode is treated, which distinguishes it from conditions like schizophrenia.
Mixed Features
Sometimes manic and depressive symptoms show up at the same time. You might feel intensely energized and agitated while simultaneously experiencing deep hopelessness, or have racing thoughts paired with a profoundly depressed mood. These mixed episodes are particularly distressing because the combination of high energy and suicidal thinking creates an elevated risk of self-harm. Mixed features can occur in either manic or depressive episodes and are one of the more difficult presentations to recognize and treat.
Bipolar I, Bipolar II, and Cyclothymia
The three main forms of bipolar disorder differ primarily in the intensity and pattern of mood episodes. Bipolar I requires at least one full manic episode. Depressive episodes are common but not required for diagnosis. Bipolar II requires at least one hypomanic episode and at least one major depressive episode, with no history of full mania. People with bipolar II often experience more frequent and longer-lasting depressive episodes.
Cyclothymic disorder is a milder but chronic form. It involves many periods of hypomanic symptoms and depressive symptoms cycling over at least two years (one year in children and teens), with symptoms present during at least half that time. The mood shifts never reach the full severity of a manic or major depressive episode, but the constant fluctuation can still significantly affect quality of life.
How Symptoms Look Different in Children
Bipolar disorder in children and adolescents often doesn’t look like the textbook adult version. Rather than classic euphoric mania, children are more likely to show severe irritability, explosive outbursts, and behavioral problems. There’s significant overlap with ADHD symptoms, including hyperactivity, impulsivity, difficulty sustaining attention, and emotional dysregulation. Children with a parent who has bipolar disorder are at roughly eight times greater risk of developing ADHD, and the shared features of inattention and disinhibition make it especially hard to distinguish the two conditions early on.
Mood swings in children with bipolar disorder tend to be more rapid and less distinct than the clearly defined episodes seen in adults. Rather than weeks of mania followed by weeks of depression, children may cycle through moods within a single day. Declining school performance and frequent, intense mood shifts that seem disproportionate to the situation are common early signs.
Early Warning Signs Before an Episode
Most mood episodes don’t appear out of nowhere. Prodromal symptoms, the subtle changes that precede a full episode, often develop days or weeks beforehand. The most reliable warning signs before mania include racing thoughts, a noticeable increase in energy or activity level, and reduced need for sleep. Before a depressive episode, the earliest signals are typically a drop in mood, withdrawal from activities, and difficulty concentrating.
Research on younger populations has identified a broader set of precursors: irritability, mood swings, anxiety, declining performance at work or school, and subthreshold manic symptoms that don’t quite meet the criteria for hypomania. Panic-level anxiety and attention problems have also been flagged as early markers in people who later develop the full disorder. Learning your own personal pattern of warning signs is one of the most effective tools for managing bipolar disorder long-term, since early intervention at the prodromal stage can sometimes prevent a full episode from developing.