What is burnout?

Burnout, or occupational exhaustion, is today an extremely widespread term in everyday language — sometimes to the point of losing its clinical precision. Here is what it actually covers.

The word comes from the English verb to burn out, like a candle that has burned all the way down. It was popularized in 1974 by the American psychiatrist Herbert Freudenberger. He was volunteering at a free clinic in New York and observed, both in caregivers and in himself, a progressive loss of energy, motivation, and commitment. A few years later, the psychologist Christina Maslach proposed the first scientific definition of the phenomenon along with a questionnaire to measure it, the Maslach Burnout Inventory, which remains the most widely used tool in research today.

A precise definition, not just a rough patch

The World Health Organization (WHO) defines burnout as a syndrome resulting from chronic workplace stress that has not been successfully managed. Since 2019, it has appeared in the International Classification of Diseases (ICD-11), which took effect in 2022, as an occupational phenomenon. This wording was deliberately chosen so as not to classify it as a disease in the strict medical sense, while still acknowledging its reality and its potential severity.

This distinction has concrete consequences. Burnout is not a psychiatric diagnosis: it does not appear in the DSM-5, the American classification of mental disorders. In France, the Haute Autorité de santé (HAS, the French National Authority for Health) refers to it as “occupational exhaustion syndrome.” In its 2017 guidelines, it asks physicians to systematically look for an associated disorder, such as depression, an anxiety disorder, or post-traumatic stress, which would then require its own specific treatment. The WHO's definition also insists on one point: the term applies specifically to the occupational context. It should not be used to describe exhaustion in other areas of life, even though parental burnout or caregiver burnout share some of the same features.

Three dimensions, not a single symptom

According to the WHO and Christina Maslach's model, burnout is characterized by three distinct dimensions, present to varying degrees from one person to another:

• Emotional and physical exhaustion: a feeling of being drained of one's resources
• Cynicism or detachment toward one's work: a form of withdrawal, sometimes indifference, toward tasks that were previously a source of engagement
• A reduced sense of personal effectiveness: the feeling of no longer being up to the task, despite the effort being put in

These three dimensions are connected. Exhaustion is generally the first to appear and the most central. Detachment often acts as a form of protection: people disengage in order to suffer less. The reduced sense of effectiveness follows from this, since the person is now working with fewer resources and less motivation.

The Copenhagen Burnout Inventory (CBI), the screening tool used on Hygietest, approaches burnout from a slightly different angle. It was developed in the early 2000s by a team at Denmark's National Research Centre for the Working Environment, led by Tage Kristensen. Its authors considered that the core of burnout is exhaustion itself, and that cynicism and reduced effectiveness are better understood as ways of reacting to it, or as its consequences. The CBI therefore measures fatigue and exhaustion across three domains: personal exhaustion, work-related exhaustion, and exhaustion related to the people one works with (clients, patients, students, service users). Its 19 questions are free to use, unlike the Maslach Burnout Inventory, and it has been validated in numerous countries. This structure makes it possible, in particular, to distinguish exhaustion caused by work from fatigue that might have other origins.

A massive reality, in France and elsewhere

In France, the 13th Empreinte Humaine/OpinionWay barometer, published in September 2024 based on a survey of 2,000 employees, estimated that about 30% of them showed signs of burnout at the time of the survey. The 2025 edition found a similar figure, 31%. These barometers are based on online questionnaires conducted for a consulting firm: they are useful for tracking trends, but they are not medical diagnoses. Data from income-protection insurers nonetheless confirm the scale of the phenomenon. According to Malakoff Humanis's 2026 study, psychological disorders — including depression, anxiety, and occupational exhaustion — accounted for 37.8% of work absences longer than 30 days in 2025. This has now become the leading cause of long-term sick leave.

In the United States, a 2018 Gallup study of 7,500 employees found that 23% felt burned out at work “very often” or “always,” and 44% “sometimes.” Among physicians, the American Medical Association estimated that about 45% showed at least one symptom of burnout in 2023.

At the international level, a 2023 survey by the McKinsey Health Institute, covering more than 30,000 employees across 30 countries, found symptoms of burnout in about 22% of them. Healthcare, education, and social work are consistently among the most exposed occupations. Figures vary considerably from one study to another depending on the questionnaire and the threshold used. There is no official global statistic from the WHO, partly because burnout is not a medical diagnosis.

What burnout is not

Burnout is neither a simple bout of temporary tiredness that a good night's sleep would resolve, nor a sign of personal weakness. It is a gradual process, generally linked to a prolonged imbalance between the demands of a work situation and the resources available to cope with them. This imbalance can affect anyone, regardless of how resilient to stress they may appear to be.

Nor is it synonymous with depression, even though the two resemble each other and often overlap. Depression affects a person's entire life: the person loses interest in almost everything, including hobbies and loved ones. In burnout, at least at first, the suffering tends to stay centered on work, and interest in other areas of life can remain intact. An unaddressed burnout can, however, progress into depression. If in doubt, the hub's Am I depressed? test can help clarify things.

Related terms also circulate, such as “bore-out,” exhaustion linked to boredom and a lack of meaningful tasks, or “brown-out,” a loss of meaning in the face of work seen as pointless. These describe real forms of suffering, but they are not concepts recognized by the WHO or the HAS, and their boundaries remain fuzzy. Whatever term is used, what matters is the same question: does this exhaustion persist, and is it affecting your health and your daily life?

Paradoxically, it is often the most dedicated people who burn out: those who place great importance on their work, struggle to say no or to delegate, and set the bar very high for themselves. Research shows, however, that the main causes lie in how work is organized rather than in personality. Christina Maslach identified six of them: an excessive workload, a lack of autonomy, a lack of recognition, deteriorating relationships at work, a sense of unfairness, and a conflict between what one is required to do and what one believes to be right.

To assess your own level of exhaustion, take the “Am I burned out?” test.