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Fatigue, the persistent lack of physical or mental energy and motivation, is increasingly common in our stress-filled world. It is often accompanied by muscle aches, apathy, lethargy and drowsiness. Fatigue is a normal response to high emotional stress, physical exertion, boredom and inadequate sleep. However, it may be a sign of more serious physical and psychological problems, such as depression, under active thyroid, sleep disorder and allergy. |