Fatigue disorders are medical conditions characterized by persistent and overwhelming tiredness that does not improve with rest. These disorders can significantly impact daily activities and quality of life. Common types include chronic fatigue syndrome and fibromyalgia, which may involve additional symptoms like pain and cognitive difficulties. The causes of fatigue disorders can vary widely and may include physical, psychological, or environmental factors. Diagnosis often requires a thorough medical evaluation to rule out other conditions. Treatment typically focuses on managing symptoms and may involve lifestyle changes, therapy, and medication to improve overall well-being.