Here’s a few possible reasons…
1 – Iron deficiency – also called anemia, is a condition that can make you feel extremely run-down and exhausted. That’s because iron is what produces red blood cells, and without enough red blood cells your blood can’t supply your organs with the amount of oxygen they need to function properly. Other symptoms of this condition include shortness of breath, heart palpitations, and pallor.
Iron deficiency is common in women who still menstruate and about 1 in 20 men and postmenopausal women.
2 – Sleep apnea is a condition where your throat may narrow or even close for 10 seconds or more as you sleep. This can make it difficult for you to breathe, causing you to wake often at night as your body reacts to the stopped airflow.
Waking often at night can make you feel tired throughout the daytime hours. Sleep apnea may also cause you to snore and have a drop in your blood oxygen levels. This condition is more common in overweight, middle-aged men.
3 – Depression – Tiredness is a common symptom of depression. Depression can leave you feeling drained of all your energy, and it may even make it difficult for you to fall asleep or cause you to wake up early each day. Other symptoms of this mood disorder, which include feelings of hopelessness, anxiety, low sex drive, and aches and pains, can range from mild to severe.
4 – Underactive thyroid – A common symptom of hypothyroidism is feeling tired. The symptoms of this condition develop slowly, so you might not notice any right away. You can also experience weight gain, depression, or muscle aches and pains.
A blood test can help your doctor measure your hormone levels for a proper diagnosis. Underactive thyroid is more common in women and older adults.
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