The most common causes of constant tiredness are unglamorous: short or broken sleep, stress, inactivity, alcohol, and caffeine - audit those honestly before hunting for disease.
Two weeks of steady sleep, daily walking, less alcohol, and no afternoon caffeine fixes more fatigue than any supplement. If that changes nothing, the testable suspects are real: iron-deficiency anemia, underactive thyroid, diabetes, depression, sleep apnea (especially with snoring), medication side effects, and post-viral fatigue. See a doctor for weeks of unexplained tiredness, and sooner with red flags: unintentional weight loss, night sweats, breathlessness on mild effort, or new heavy periods. Pymander is a free AI doctor, 24/7 by text, and can help you triage the pattern and prep which labs to ask about.
What to do
Common questions
Why am I always tired?
The most common causes of constant tiredness are unglamorous: not enough sleep or broken sleep, stress, too little physical activity, alcohol, too much caffeine, and carrying extra weight. Before hunting for a disease, audit those honestly for two weeks - a steady sleep schedule, daily walking, cutting alcohol, and easing caffeine after lunch fix more fatigue than any supplement. If good sleep hygiene changes nothing, the medical suspects worth testing are real: iron-deficiency anemia, an underactive thyroid, diabetes, depression and anxiety (which read as exhaustion as often as sadness), sleep apnea - especially if you snore and wake unrefreshed - medication side effects, and post-viral fatigue after infections like COVID or glandular fever. See a doctor if tiredness has lasted weeks without explanation or is getting worse, and get seen sooner if it comes with red flags: unintentional weight loss, night sweats, breathlessness on mild effort, or new heavy periods. Pymander is a free AI doctor, 24/7 by text, that can help you triage your pattern and prep the right labs to ask about.