Wear Sensor

Tiredness that won't go away: is it your body, your mind or your job?

Produced by InnerlyTests using artificial intelligence, based on the sources listed at the end. The review is editorial and was also done with AI: no psychologist or other mental health professional has reviewed this content. Updated 2026-10-25. • About

People who look for a tiredness test usually want to know where it comes from. This guide goes through the practical questions one at a time. The Wear Sensor can help you reflect on how you are doing right now, but it cannot find the cause of your tiredness.

Tired in your body, your mind or from work?

Feeling tired now and then is part of life. According to the NHS, the UK's public health service, what deserves attention is feeling tired all the time without knowing why. And the same tiredness can have more than one source.

Common causes listed by the NHS include:

• Not sleeping enough, or finding it hard to get to sleep (insomnia).
• An unbalanced diet and little physical activity.
• Stress, depression and hard times, such as grief or the first months with a baby.
• Hormonal changes, for example during puberty, pregnancy or menopause.
• Some illnesses, such as glandular fever (mono) and COVID-19, and some treatments and medicines.

Signs it is worth seeing a doctor first

Tiredness with no clear reason that has lasted a while and is not improving can be a sign of a medical condition. The NHS lists sleep apnea (breathing pauses while you sleep), iron deficiency anemia, diabetes, thyroid problems and myalgic encephalomyelitis, also called chronic fatigue syndrome. With an underactive thyroid, extreme tiredness and low mood are among the common symptoms. Because symptoms overlap, the NHS advises against trying to diagnose yourself.

A doctor may order blood tests, for example to check for anemia, diabetes or thyroid problems. The NHS suggests booking an appointment when:

• You have been tired for a few weeks without knowing why.
• Tiredness gets in the way of your daily life.
• Tiredness comes with other symptoms, such as weight loss or changes in mood.
• Someone has noticed you making choking or gasping sounds while you sleep.

Burnout: what the WHO means by the term

The World Health Organization (WHO) included burn-out in ICD-11, its international classification, as an occupational phenomenon, not as a medical condition. Its definition describes chronic workplace stress that has not been successfully managed, with three dimensions: exhaustion or depleted energy; mental distance from one's job, or negative and cynical feelings about it; and reduced professional efficacy.

For the WHO, the term applies only to work and should not describe other areas of life. That does not make the exhaustion of caring for someone or getting through a hard time any less real. And the Wear Sensor does not measure burnout: its questions are about everyday emotional tiredness and do not mention work.

When the strain comes from work, not everything is up to you. The WHO recommends that employers change working conditions, for example with flexible arrangements, and lists among the risks to mental health:

• Too much work or too fast a pace, and too few staff.
• Long hours, unsocial shifts or rigid schedules.
• Little control over how you work or how much you take on.
• Limited support from colleagues, or authoritarian supervision.
• Violence, harassment or bullying.

When tiredness comes with emptiness or no enjoyment

Sometimes what we call tiredness is something else: an emptiness, not wanting to do anything, a sense of being tired of life itself. The WHO describes a depressive episode as a depressed mood (feeling sad, irritable or empty) or a loss of pleasure and interest lasting two weeks or more, for most of the day, nearly every day. Feeling very tired, disrupted sleep and hopelessness are among the other possible symptoms. This description is not meant for self-diagnosis.

Burnout and depression share some features, such as loss of interest, and where one ends and the other begins is still debated. A review of 92 studies concluded that the distinction is conceptually fragile (Bianchi and colleagues, 2015). A later meta-analysis found the two associated but concluded they are different phenomena (Koutsimani and colleagues, 2019). The label matters less than being assessed by a professional, and the WHO points out that depression can be treated effectively.

If the emptiness comes with thoughts of dying or of hurting yourself, or if you feel you are not safe, reach out now to a trusted person near you, the emergency number where you live or an emotional support service in your country. Many people who have felt this way have found help. Your answers never leave your device, and this site does not provide medical or psychological care.

What tends to help

For sleep, the NHS suggests regular sleep times, 6 to 9 hours a night, some time to unwind before bed, no food, caffeine or exercise close to bedtime, and no screens in the last hour. A balanced diet, regular physical activity and not much alcohol are also on the list.

Short breaks count. A meta-analysis of experimental and quasi-experimental studies (22 samples) found small but statistically significant effects of short breaks between tasks: more vigor and less fatigue (Albulescu and colleagues, 2022).

So does switching off from work. In a meta-analysis of more than 26,000 people, not thinking about work after hours was more strongly linked to lower fatigue than relaxing or choosing how to spend free time (Bennett and colleagues, 2018). These are associations, not proof of cause.

And don't carry it all alone: talking to someone you trust and staying in touch with friends and family are among the self-care steps the WHO suggests for anyone with depressive symptoms. If the tiredness or low mood has lasted a few weeks, or weighs on your daily life, see a doctor or a psychologist; you don't need to wait for it to get worse.

What 4 questions can tell you

The Wear Sensor is a self-reflection quiz. Its 4 questions cover how you end a full day, whether you feel drained even when sleeping well, whether you have lost pleasure in things you used to enjoy, and how long you take to recover. It is not a burnout scale or a version of any scientific questionnaire, and it has not been validated. The result bands are cut-offs we chose.

The result is a snapshot of this moment and may change next week. It cannot tell whether your tiredness is physical, emotional or work-related. Two answers deserve attention even on their own: feeling drained despite good sleep, and loss of pleasure that has lasted for weeks. In those cases, the signs above matter more than any score.

Sources

1. NHS (2023). Tiredness and fatigue [reviewed 2 Jun 2023]. Accessed 25 Oct 2026.
2. NHS (2025). Underactive thyroid (hypothyroidism): Symptoms [reviewed 28 Apr 2025]. Accessed 25 Oct 2026.
3. World Health Organization (2019). Burn-out an “occupational phenomenon”: International Classification of Diseases (departmental update, 28 May 2019). Accessed 25 Oct 2026.
4. World Health Organization (2026). Mental health at work (fact sheet, 15 Sep 2026). Accessed 25 Oct 2026.
5. World Health Organization (2026). Depressive disorder (depression) (fact sheet, 11 Sep 2026). Accessed 25 Oct 2026.
6. Bianchi, R., Schonfeld, I. S., & Laurent, E. (2015). Burnout–depression overlap: A review. Clinical Psychology Review, 36, 28–41. DOI: 10.1016/j.cpr.2015.01.004
7. Koutsimani, P., Montgomery, A., & Georganta, K. (2019). The relationship between burnout, depression, and anxiety: A systematic review and meta-analysis. Frontiers in Psychology, 10, 284. DOI: 10.3389/fpsyg.2019.00284
8. Albulescu, P., Macsinga, I., Rusu, A., Sulea, C., Bodnaru, A., & Tulbure, B. T. (2022). “Give me a break!” A systematic review and meta-analysis on the efficacy of micro-breaks for increasing well-being and performance. PLoS ONE, 17(8), e0272460. DOI: 10.1371/journal.pone.0272460
9. Bennett, A. A., Bakker, A. B., & Field, J. G. (2018). Recovery from work-related effort: A meta-analysis. Journal of Organizational Behavior, 39(3), 262–275. DOI: 10.1002/job.2217

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