What to explain
Describe what changed at work and what your brain fog stops you doing.
I would like to discuss whether work-related burnout, depression, poor sleep, a medicine, or another health problem could be contributing to my brain fog. Could we review what changed at work, whether I improve away from work, and decide what treatment, leave, workplace support, or medical checks may help?
Questions to take in
Ask what needs medical care, mental health care, work changes, leave, or follow-up.
- Do my work changes and symptoms fit work-related burnout, and what other mental or medical conditions need assessment?
- Should I complete a depression, anxiety, burnout, or sleep questionnaire, and who will review the answers?
- Which blood tests make sense, given my symptoms, bleeding, diet, medicines, health history, or previous results?
- Do my snoring, shift work, insomnia, breathing pauses, or daytime sleepiness need a sleep assessment?
- Would occupational health, a mental health clinician, a sleep service, or another specialist help with a specific problem?
- Which work duties are unsafe for me now, and what temporary changes or leave should I discuss with my workplace?
- What changes at work should we try, and when should we check whether my sleep, mood, concentration, and safety have improved?
- Which symptoms mean I should seek urgent help instead of waiting for the next appointment?
Mood screens and medical checks your clinician may consider
What each screen or test can and cannot show.
Cortisol, DHEA-S, CRP, and commercial stress panels do not diagnose burnout. A CBC, TSH, ferritin, vitamin B12 test, or sleep study may be useful when your symptoms or medical history support that specific check.
PHQ-9 Depression Questionnaire
PHQ-9 records nine depression symptoms from the previous two weeks. It does not diagnose depression or decide whether work caused the symptoms. Any answer about self-harm needs direct follow-up.
Read the test guideGAD-7 Anxiety Screener
GAD-7 records common anxiety symptoms from the previous two weeks. It does not ask about suicide or show why the brain fog is happening.
Read the test guideTSH
TSH can help check thyroid function when symptoms or history justify it. It does not measure stress or diagnose burnout.
Read the test guideCBC + CMP Blood Test Bundle
CBC checks blood cells. CMP checks glucose, electrolytes, proteins, liver function, and kidney function. The bundle may find another problem, but it does not test for burnout.
Read the test guideFerritin
Ferritin estimates stored iron. It may help when there is heavy bleeding, low iron intake, pregnancy, restless legs, breathlessness, or reduced exercise tolerance.
Read the test guideVitamin B12
Vitamin B12 testing may help when diet, absorption problems, metformin, acid-reducing medicine, anemia, numbness, balance trouble, or memory symptoms raise concern.
Read the test guideSleep Study (PSG)
A sleep study can check breathing and other sleep problems when there is snoring, witnessed breathing pauses, gasping, morning headaches, or marked daytime sleepiness.
Read the test guideBefore the appointment
Take your work timeline, sleep notes, medicines, recent results, and examples of daily problems.
A simple timeline of workload, hours, shifts, staffing, role changes, bullying, conflict, missed breaks, leave, and when each symptom began.
Two weeks of sleep times, awakenings, snoring or gasping reports, naps, caffeine, alcohol, cannabis, nicotine, and work shifts.
Two examples of work tasks that became slow, incomplete, forgotten, or unsafe. Include the date and what happened.
A list of symptoms at work and away from work, including low mood, loss of interest, worry, panic, headaches, pain, stomach symptoms, and heart symptoms.
Every medicine and supplement, including start dates, stopped doses, missed doses, side effects, stimulants, sleep aids, and hormone medicines.
Recent lab reports, diagnoses, pregnancy or postpartum dates, menstrual bleeding, menopause symptoms, infections, injuries, and major life events.
Steps already tried at work, such as fewer hours, a changed shift, protected breaks, different duties, leave, more staff, or help from a manager or union.
Any workplace form that needs medical information, and its deadline. Ask the clinician what they can and can't certify.
For example: I missed two medicine checks, reread one email six times, forgot a familiar route, or took three hours on a task that usually takes one.
How the doctor assesses this
Details that help a clinician assess work-related burnout
- Work demands rose, staffing fell, hours changed, breaks disappeared, control was reduced, or bullying, conflict, or unsafe conditions began before the symptoms.
- You feel exhausted, detached or cynical about the job, and less able to do work that you previously managed.
- Your concentration, memory, sleep, mood, or physical symptoms change with workdays, shifts, leave, or a specific workplace event.
Reasons to check depression, anxiety, sleep, medicines, anemia, thyroid, and other causes too
- Symptoms began before the work problem or follow an infection, head injury, medicine change, pregnancy, bleeding, a neurological event, or another recorded medical change.
- The same exhaustion, low mood, loss of interest, and thinking problems continue across work, home, leave, and enjoyable activities.
- Snoring, breathing pauses, gasping, restless legs, shift-work sleep loss, or another sleep problem better explains the timing and daytime symptoms.
- Brain fog reliably follows standing, meals, migraine, alcohol, cannabis, a medicine dose, menstrual bleeding, or another repeatable event.
- A short holiday doesn't change the symptoms at all. A holiday response alone can't confirm or exclude burnout.
What to understand before choosing care
Information used to choose medical tests, mental health care, work changes, leave, or follow-up.
- There is no blood, saliva, hair, or urine test that diagnoses burnout.
- Bring exact work changes and examples of mistakes, slowed tasks, missed steps, or safety problems.
- Ask about depression, anxiety, sleep, medicines, substance use, anemia, thyroid disease, and other symptoms that need their own assessment.
- A burnout questionnaire can record symptoms. It cannot prove the cause, replace a medical visit, or decide whether you need leave.
- Personal coping can help, but excessive workload, low control, bullying, unsafe hours, and poor staffing may require workplace changes.
What the research found
What current guidance and research say about work stress, burnout, thinking problems, and safer care.
WHO classifies burnout as an occupational phenomenon, not a medical condition. It describes exhaustion, distance or cynicism about the job, and reduced professional effectiveness after unmanaged workplace stress.
A review of 59 articles and six book chapters found sleep, memory, and planning problems in people with severe work-related exhaustion. It also found no diagnostic biomarker.
Burnout, depression, and anxiety overlap a lot, a 2019 review found. A work-related description cannot replace a depression, anxiety, or safety assessment.
A 2025 physician review connected specific work stressors with burnout and examined workplace interventions. Its findings directly concern physicians, so applying them to every job needs care.
A 2024 review included 85 studies and 288,581 nurses. It linked burnout with less safe, lower-quality care, but most studies measured nurses once and can't prove cause for one worker.
How age, sex, pregnancy, and other health needs change the appointment.
WHO's burnout definition applies to work. Students and unpaid caregivers can have severe exhaustion and brain fog, but their clinician may use terms other than occupational burnout.
Burnout can affect people of any sex. Sex does not create a different burnout test or blood range.
Heavy periods, pregnancy, recent birth, breastfeeding, and menopause can add anemia, thyroid, sleep, mood, and medicine questions. Report these details instead of assuming every symptom comes from work.
Young workers may have less control, insecure hours, night shifts, bullying, or unsafe workloads. Describe the hours, duties, breaks, training, and who was told about the problem.
Older workers need the same work review plus medicine, sleep, heart, neurological, anemia, thyroid, hearing, and vision checks when symptoms suggest them.
United States, United Kingdom, and Australia
Where to seek help for burnout and work stress.
US United States
Book primary care. Take a dated list of work changes, sleep notes, medicines, results, and two difficult tasks. Ask what needs testing, treatment, leave, or referral.
- Start with primary care when brain fog, sleep, mood, physical symptoms, or safety problems need a medical review.
- Use occupational health, an employee assistance program, a manager, or a union when work hours, duties, staffing, bullying, or safety needs action.
- Use emergency care for immediate danger, suicidal intent, sudden neurological symptoms, severe chest symptoms, or inability to work safely.
UK United Kingdom
Book a GP appointment. Show your GP the work dates, sleep notes, medicines, results, and difficult tasks. Ask about tests, a fit note, talking therapy, or occupational health.
- Book a GP appointment when work stress is persistent, distressing, or affecting daily life, sleep, mood, health, or safety.
- HSE says employers must assess and act on work stress risks. A manager, union representative, GP, or occupational health team may help.
- Use A&E or urgent local mental health care for immediate danger, sudden neurological symptoms, severe chest symptoms, or inability to stay safe.
AU Australia
Book a GP appointment. Tell the GP what changed at work and bring sleep notes, medicines, results, and safety concerns. Ask about tests, a mental health plan, leave, or occupational review.
- Book a GP appointment for persistent brain fog, sleep, mood, physical symptoms, or safety problems.
- Tell a workplace health and safety representative, manager, union, or state regulator about unsafe workload, low control, bullying, harassment, or poor support.
- Call triple zero for immediate danger, suicidal intent, sudden neurological symptoms, severe chest symptoms, or inability to stay safe.
Safety
Show how it affects daily life
- For fourteen days, record work hours, shift, breaks, sleep, brain fog, mood, headache, caffeine, medicines, and whether you were at work or away.
- Record one difficult task each day. Write how long it took, which step failed, whether anyone was at risk, and what help you needed.
- Compare workdays, days off, and leave without forcing extra work or skipping sleep to test yourself.
- If a task involves driving, machinery, medicine, heights, children, patients, money, or someone else's safety, report mistakes quickly and stop when you can't work safely.
- At follow-up, compare the exact work changes, medical findings, sleep, mood, daily function, and safety events.
Source checked
Sources behind this handout.
- 01
World Health Organization. Burn-out an occupational phenomenon. ICD-11 classification guidance.
Source - 02
National Institute for Occupational Safety and Health. About Stress at Work. Updated February 13, 2024.
Source - 03
Centers for Disease Control and Prevention. Providing Support for Worker Mental Health. Updated May 12, 2026.
Source - 04
NHS. Work-related stress: signs, causes, and ways to seek help.
Source - 05
UK Health and Safety Executive. Work-related stress and how to manage it. Updated June 4, 2024.
Source - 06
Safe Work Australia. Psychosocial hazards and work health and safety duties.
Source - 07
Grossi G et al. Stress-related exhaustion disorder: assessment, sleep, cognition, and physiological changes. Scandinavian Journal of Psychology. 2015. PMID: 26496458.
Source - 08
Koutsimani P et al. The Relationship Between Burnout, Depression, and Anxiety: A Systematic Review and Meta-Analysis. Frontiers in Psychology. 2019. PMID: 30918490.
Source - 09
Belkic K. Toward better prevention of physician burnout: work stressors and organizational interventions. Frontiers in Public Health. 2025. PMID: 40177083.
Source - 10
Li LZ et al. Nurse Burnout and Patient Safety, Satisfaction, and Quality of Care: A Systematic Review and Meta-Analysis. JAMA Network Open. 2024. PMID: 39499515.
Source