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Common Causes Of Fatigue: 13 Overlooked Reasons You Feel So Tired


Feeling constantly drained and weary for no clear reason is frustratingly common. While fatigue is a symptom of numerous conditions, examining key lifestyle factors and ruling out underlying medical issues helps identify treatable causes of exhaustion.

Top Common Causes Of Fatigue


1. Lack of Adequate Sleep

Not getting sufficient quality sleep is one of the most common yet overlooked causes of fatigue. Adults need 7-9 hours nightly for optimal function. Making sleep a priority and maintaining proper sleep hygiene helps overcome fatigue.

2. Poor Sleep Quality

Even with adequate duration, disruptions like insomnia, frequent wakings, sleep apnea, and restless legs reduce restorative deep NREM and REM sleep needed to combat fatigue. Addressing issues improves sleep quality.

3. Stress and Mental Health

Unmanaged chronic psychological and emotional stress takes a toll physically, manifesting as constant mental fog and physical tiredness. Anxiety, depression, and burnout also sap energy. Stress reduction techniques bring relief.

4. Unbalanced Diet

Diets low in protein, iron, B vitamins, and other essential nutrients fail to provide sufficient calories and micronutrients for energy metabolism and cellular function, resulting in fatigue.

5. Dehydration

Inadequate fluid intake leads to dehydration, reducing blood volume and oxygen circulation needed for body processes and energy. Drinking enough water prevents this.

6. Lack of Physical Activity

Leading a sedentary lifestyle with little exercise reduces muscle and cardiovascular endurance causing easy fatigability. Regular activity boosts stamina and vitality.

7. Underlying Medical Conditions

Various medical issues like anemia, thyroid disorders, chronic fatigue syndrome, sleep apnea, heart disease, and autoimmune issues directly cause profound fatigue. Seeking treatment helps.

8. Anemia

Anemia, or low red blood cells that carry oxygen, induces extreme exhaustion, especially with activity. Iron, B12, and folate supplementation resolve most cases.

9. Thyroid Issues

Hypothyroidism from an underactive thyroid slows metabolism, reducing energy. Medications normalize thyroid hormone levels to relieve fatigue.

10. Chronic Illnesses

Diseases like fibromyalgia, rheumatoid arthritis, cancer, diabetes, and autoimmune disorders directly involve fatigue. Controlling inflammation helps symptoms.

11. Medication Side Effects

Some prescription drugs like blood pressure pills, antidepressants, and sedatives make fatigue a side effect. Adjusting medication dosage or timing often minimizes tiredness.

12. Sleep Apnea

This disorder with impaired breathing during sleep sabotages restorative sleep. Using CPAP machines reduces fatigue by treating apnea episodes.

13. Sedentary Lifestyle

Living an inactive life with prolonged sitting and little exercise leads to poorer sleep, obesity, weakened muscles, and cardiovascular function which heightens fatigue.


If lifestyle adjustments do not relieve constant tiredness, consult a doctor to identify and address medical conditions contributing to fatigue. Treating the root cause is key to reviving energy, productivity, and well-being.

Frequently Asked Questions

1. Is fatigue a sign of pregnancy?

Yes, fatigue and exhaustion, especially in the first trimester, are extremely common during pregnancy.

2. Can certain foods give you more energy?

Some energizing options include oily fish, nuts, seeds, yogurt, eggs, beans, whole grains, and leafy greens.

3. Is fatigue a symptom of COVID-19?

Yes, fatigue from viral infection and immune response is one of the most common symptoms of COVID-19.

4. Can fatigue be cured?

Identifying and treating the underlying cause(s) relieves fatigue in most cases. Managing chronic diseases also helps with symptomatic treatment.

5. When should you see a doctor for fatigue?

If lifestyle changes fail to improve fatigue within a month, seek medical evaluation to rule out underlying conditions.

Dr. Harold Gojiberry is not just your ordinary General Practitioner; he is a compassionate healthcare provider with a deep commitment to patient well-being and a passion for literature. With extensive medical knowledge and experience, Dr. Gojiberry has made a significant impact in the field of healthcare, particularly in the area of liver diseases and viral hepatitis.

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