01More than mood swings
Bipolar disorder involves episodes that markedly change mood, energy, sleep and activity compared with a person’s usual functioning. It is not simply switching quickly from happiness to sadness. Periods of stability can occur between episodes, with considerable individual variation.
02Bipolar I disorder: a manic episode
Bipolar I involves at least one manic episode. Mood becomes unusually elevated, expansive or irritable, alongside markedly increased energy or activity, generally lasting at least a week, or less if hospitalisation is necessary. The impact is substantial and may include serious impairment, dangerous behaviour or psychotic symptoms. Depression is common but is not required for a bipolar I diagnosis.
03Bipolar II disorder: hypomania and depression
Bipolar II involves at least one hypomanic episode and one major depressive episode, with no history of mania. Hypomania lasts at least four consecutive days and represents an observable change from usual functioning. It does not cause the severe impairment of mania, but bipolar II can still have a substantial impact, particularly through depression.
04Which changes need exploring?
A much lower need for sleep without usual tiredness, rapid speech, racing thoughts, unusual confidence, many new projects or increased risk-taking may warrant attention. What matters is whether they occur together during a distinct period, differ from the person’s baseline and have consequences. No isolated sign establishes the diagnosis.
05Why can diagnosis take time?
People often seek help during depression, while previous hypomania may have felt like renewed productivity. Reconstructing changes in sleep, energy, medication and life events helps reveal the pattern. With the person’s consent, observations from someone close to them can add useful context.
06Distinguishing similar presentations
ADHD, anxiety, substances, medication effects and some medical conditions can produce overlapping signs. Creativity, emotional intensity or giftedness are not sufficient signs of bipolar disorder. Assessment examines the episodic nature of changes, their history and their impact.
07What does an assessment contribute?
Clinical interviews and suitable measures explore symptoms, personal history and alternative explanations. Psychological assessment can contribute to this understanding and guide next steps. Suspected bipolar disorder also requires medical assessment, usually by a psychiatrist, to consider possible causes and organise treatment.
08Understanding the condition supports stability
Care may combine prescribed medication, psychotherapy, psychoeducation and attention to sleep and daily rhythms. Knowing early warning signs and agreeing a plan with clinicians supports an earlier response. Severe agitation, very little sleep or dangerous behaviour require prompt medical help; in an emergency in France, call 15 or 112.