Chronic Fatigue Syndrome (CFS) is a complex disorder characterized by extreme fatigue that lasts for at least six months and does not improve with rest. This fatigue is often accompanied by other symptoms, such as sleep disturbances, cognitive difficulties, and muscle pain. The exact cause of CFS is still unknown, but it may involve a combination of genetic, environmental, and psychological factors. Diagnosis of CFS can be challenging, as there are no specific tests for it. Healthcare providers typically rely on patient history and symptom evaluation. Treatment focuses on managing symptoms and improving quality of life, often involving a combination of medication, lifestyle changes, and therapy.