Fatigue
Fatigue is a general feeling of tiredness. It may or may not be accompanied by other symptoms. Fatigue can be caused by a lack of sleep, poor diet, or stress, but it can also be a sign that something more serious is happening in the body.
If a person is experiencing excessive fatigue, they are advised to call a doctor immediately to rule out underlying conditions such as heart problems (chronic obstructive pulmonary disease), lung disease (pneumonia), and cancer. In addition, if they have experienced fatigue for several weeks, a doctor may ask for a complete blood count (CBC) test to rule out anemia or leukemia.
