Why am I tired even after eight hours of sleep?
You can still be tired after eight hours of sleep because duration is not the same as quality. Fragmented sleep from apnea, alcohol, late screens, an uncomfortable room or an anxious mind delivers eight broken hours that restore little.
Beyond the bedroom: iron deficiency, thyroid problems, blood sugar swings, low mood and some medicines all produce tiredness that sleep cannot fix. Unrefreshing sleep plus loud snoring is apnea until shown otherwise.
Fix the basics for two weeks, fixed wake time, no alcohol near bed, cool dark room, then persist tired people deserve blood tests, not lectures about sleep hygiene.
Source: NHS, insomnia
See a doctor promptly if
- Tiredness with unintentional weight loss, drenching night sweats, or new lumps
- Breathlessness at rest or on mild effort, chest pain, or fainting
- Very heavy periods, black tarry stools, or visible blood in stool alongside tiredness
- Falling asleep while driving or operating machinery, or witnessed pauses in breathing during sleep
- New confusion, severe headache, or genuine loss of muscle power rather than low energy
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Answered by the AskDoc Medical Team · Medically reviewed under our Medical Director, MBBS · How we review
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No gadget fixes sleep apnea. But if your score above suggests a sleep study, a simple pulse oximeter can give your doctor useful overnight numbers for under $30.
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