Should I see a doctor for fatigue?
Last updated September 3, 2026.
Tiredness with an obvious cause usually resolves with the cause. The NHS line for a visit: tired for a few weeks without a clear reason, tiredness affecting daily life, or tiredness with weight loss, mood changes, or reports that you gasp, snort, or choke in your sleep. The workup is simple and worth it: one blood draw can check iron, thyroid, blood sugar, and B12 - all common, fixable causes - and sleep apnoea and depression both hide behind 'just tired.' When a cause shows up, treatment often works fast. Pymander is a free AI doctor, 24/7 by text, and can help you prepare for the appointment.
What to do
- Audit the basics first: sleep, stress, recent illness, alcohol, caffeine.
- A few unexplained weeks? Book it: one blood draw covers the common causes.
- Gasping at night? Mention it first: sleep apnoea is common and treatable.
- Bring the company it keeps: weight change, thirst, mood, cold intolerance.
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