Fatigue is a normal result of working , mental stress , overstimulation and understimulation, jet lag or active recreation , depression , boredom , disease and lack of sleep . It may also have chemical causes, such as poisoning or mineral or vitamin deficiencies. Chronic blood loss frequently results in fatigue, as do other conditions that cause anemia . Fatigue is different from drowsiness, where a patient feels that sleep is required. Fatigue is a normal response to physical exertion or stress, but can also be a sign of a physical disorder.
It's a simple fact of life: from time to time, almost everyone has to perform when they're feeling tired or unmotivated. However, if you consistently feel like you lack the energy to perform your daily duties, you're not dealing with ordinary tiredness — you're dealing with full-blown fatigue. Fatigue can have many causes, but the good news is that with a few simple lifestyle changes, most people can reverse the effects of fatigue in a matter of days or weeks. For cases of fatigue with a medical cause, however, more serious treatments may be needed. See Step 1 below to start overcoming your fatigue!