special subjects
Fatigue
Key Points
Fatigue is a common symptom. Fatigue is especially concerning if accompanied by certain warning symptoms, such as persistent, unintentional weight loss or chronic fever or night sweats. If a doctor uncovers no findings suggesting a cause of fatigue, tests are often not helpful in identifying the cause. Successful treatment of chronic fatigue may take work and persistence. Fatigue in older people is not a normal part of aging. 