Why Am I Always Tired and Have No Energy?

Reviewed on 6/30/2021

Fatigue, or feeling unusually tired all the time, is usually due to a medical condition or lifestyle habit. These causes of fatigue can include iron deficiency anemia, vitamin B12 or folate deficiency anemia, iron overload, chronic fatigue syndrome, sleep problems, underactive thyroid (hypothyroidism), too much caffeine, and others.
Fatigue, or feeling unusually tired all the time, is usually due to a medical condition or lifestyle habit. These causes of fatigue can include iron deficiency anemia, vitamin B12 or folate deficiency anemia, iron overload, chronic fatigue syndrome, sleep problems, underactive thyroid (hypothyroidism), too much caffeine, and others.

Feeling tired all the time is called fatigue, which is when tiredness is overwhelming and is not relieved with rest. Tiredness is able to be alleviated with rest. 

There are numerous causes for fatigue and low energy, including: 

If you've been tired with low energy for several weeks and sleep does not alleviate the symptoms, talk to your doctor. Treatment for fatigue and low energy depends on the cause. 

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Reviewed on 6/30/2021
References
https://www.nhs.uk/live-well/sleep-and-tiredness/10-medical-reasons-for-feeling-tired/

https://www.nia.nih.gov/health/fatigue-older-adults