
3. Depression
Anyone who has had a major depressive episode can tell you that they feel fatigued regularly. That is because depression interferes with both the physical and mental functioning of the body as a whole. Depression can cause severe fatigue and make even the most basic tasks feel nigh impossible. The best means of determining whether you have severe depression is you schedule a physical exam with your primary care doctor to see whether your severe fatigue is related to your depression.
According to a study published in Psychiatry Research, 90% of depressed patients participating in the survey reported severe fatigue, making it a prevalent symptom. The worst part is that 81% of those patients were already on antidepressants, which can further increase the fatigue symptom. If you fear that you may have severe depression, speak to your primary care physician immediately and see if you can get help in treating your depression, especially if one of your symptoms is extreme fatigue.