Why Are You
Always Tired?
Persistent fatigue can have many causes. Take our free assessment to explore possible reasons and get source-backed guidance on next steps.
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Common Reasons for Fatigue
Government & Public Health References
1. USAMedlinePlus — Fatigue ↗2. UKNHS — Tiredness and fatigue ↗3. CanadaCanada.ca — Sleep and health ↗4. AustraliaHealthdirect — Fatigue ↗These reputable public health sites were used as references for the information on this page.
Understand Possible Causes
Explore common medical and lifestyle factors that can contribute to tiredness.
Get Personalized Insights
Answer guided questions to see which factors may be most relevant.
Know When to Seek Help
Learn warning signs that mean it is time to speak with a professional.
Evidence You Can Trust
Content is grounded in reputable public health sources.
Possible causes
Fatigue can come from sleep, lifestyle, mental health, medication, or medical conditions.
Poor or insufficient sleep
Short sleep, irregular schedules, insomnia, alcohol, caffeine timing, pain, and screen habits can all contribute.
Sleep apnea
Snoring, choking, breathing pauses, morning headaches, and strong daytime sleepiness are reasons to ask about sleep testing.
Stress, anxiety, or depression
Mental strain often appears physically as low energy, poor sleep, loss of motivation, body tension, and poor focus.
Anemia, thyroid, B12, vitamin D, or blood sugar
Persistent fatigue with dizziness, breathlessness, cold intolerance, weight changes, thirst, or frequent urination may need medical testing.
Medication or substance effects
Some antihistamines, pain medicines, sedatives, alcohol, cannabis, and new medications may contribute to tiredness.
Post-infection or chronic illness
Fatigue after infections or with fever, swollen glands, pain, night sweats, or post-exertional crashes deserves medical review.
What you can try today
Simple, low-risk steps
- Keep a consistent wake time for 1–2 weeks.
- Reduce caffeine late in the day and alcohol near bedtime.
- Get daylight exposure early in the day.
- Track sleep, mood, symptoms, medications, meals, and activity.
- Book a medical appointment if fatigue is persistent, unexplained, or worsening.
Urgent safety
Seek medical help urgently if needed
Do not rely on this website if you have chest pain, severe shortness of breath, fainting, confusion, sudden weakness, severe headache, unusual bleeding, severe dehydration, or thoughts of self-harm.
FAQ
Frequently asked questions
Why am I tired all the time?
Common reasons include short or poor-quality sleep, stress, depression, anxiety, medication effects, anemia, thyroid disease, blood sugar issues, sleep apnea, infection, and chronic illness. Persistent or worsening fatigue should be discussed with a healthcare professional.
Can stress cause fatigue?
Yes. Stress can affect sleep, appetite, muscle tension, attention, mood, and energy. It can also exist alongside medical causes, so persistent fatigue should not automatically be dismissed as stress.
When should I see a doctor for tiredness?
Seek medical care if fatigue is persistent, worsening, unexplained, affecting daily life, or occurs with weight loss, fever, night sweats, shortness of breath, chest pain, fainting, severe weakness, confusion, or mood crisis.
Can this site diagnose me?
No. This site provides educational possibilities and source links. It does not diagnose, treat, store answers, or replace a licensed healthcare professional.
References
Source library
References are intentionally sequenced as USA, UK, Canada, and Australia.