Being weary, sleepy, and irritable are also signs. Other physical problems such as diseases, infections, respiratory disorders, anemia, cancer, alcoholism, and drug side effects can cause fatigue. So can psychological problems like depression and panic attacks. Symptoms include weakness, muscle aches and pains, excessive sleep, despair, fever, sore throat, and tender lymph nodes. Insomnia and depression may also occur.
Most cases occur in white women.
Some tests are simply used to rule out other causes of fatigue. Diagnosis is based on the patient's history of illness and ruling out other possible causes. Since the cause is unknown, healing treatments have yet to be resolved. Medical care simply relieves symptoms. If you are chronically tired, and don't know why, seek medical attention.