Around 20% people claim to have fatigue intense enough to interfere with their having a normal life.
Fatigue is a common health complaint. It is, however, one of the hardest terms to define, and a symptom of many different conditions.
Fatigue, also known as weariness, tiredness, exhaustion, or lethargy, is generally defined as a feeling of lack of energy. Fatigue is not the same as drowsiness, but the desire to sleep may accompany fatigue. Apathy is a feeling of indifference that may accompany fatigue or exist independently.

Physical causes are estimated at 20-60%, and emotional causes are the other 40-80%. The challenge is how to tell what is causing your fatigue and whether it is serious enough to see your doctor.

Fatigue Causes
Sleep disturbances, Heart diseases, Lung diseases, Nutritional disorders, Electrolyte disturbances, Endocrine disorders, Gastrointestinal disorders, Neurological disorders, Infectious diseases, Connective tissue disorders, General disorders, Gynecological problems, Exercise disturbances, and Psychological problems.

To Be Continued …