Constant fatigue: which doctor to see
Fatigue that does not lift after a weekend or a vacation is not laziness and not "just age". Behind it often stand anemia, thyroid problems, vitamin deficiency, sleep apnea or depression. Start with a general practitioner and basic tests.
Common causes
- Anemia — iron deficiency
- An underactive thyroid
- Vitamin D and B12 deficiency
- Chronic sleep deprivation and sleep apnea
- Depression and burnout
- Recent infections
- Diabetes
When to seek urgent help
Do not wait for a scheduled visit if you have any of these signs:
- Fatigue with unexplained weight loss
- Fatigue with shortness of breath and pallor
- Fatigue with fever for more than a week
- Fatigue with intense thirst and frequent urination
- Fatigue with low mood and thoughts of self-harm — help is needed now, call 103
Ambulance: 103 (103 from a mobile) · Unified rescue service: 911
Your specialist
General practitioner
What to bring to the visit
- A description: how long you have felt tired, whether it changes during the day
- A sleep diary for a week
- Previous test results
- A list of medicines and supplements you take
Frequently asked questions
What tests are usually ordered for fatigue?
Most often — a complete blood count, ferritin, TSH (thyroid), glucose, vitamin D and B12. The exact list is decided by the doctor at the visit.
Can fatigue be "just nerves"?
Yes, burnout and depression are common causes. If the tests are normal, discuss it with a psychotherapist: it is just as real and just as solvable.
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The information on this page is for reference only and does not replace a doctor's consultation. Only a doctor can make a diagnosis in person. If your condition worsens, call 103.