Posibleng Mga Sanhi para sa Chronic na Fatigue Syndrome Anemia Insomnia Depresyon Mga Problema sa Pag-abuso sa Substance Endogenous Depression Labis na katabaan Chronic Alcoholism Morbid Obesity Iron Deficiency Anemia Chronic na Obstructive Pulmonary Disease Diabetes Mellitus Pulmunya Infectious Mononucleosis Disorder na Pagkabalisa Congestive Heart Failure Spontaneous Abortion Chronic Kidney Insufficiency Cardiomyopathy Sleep Apnea Fibromyalgia Hemochromatosis Polymyalgia Rheumatica Neurocirculatory Asthenia Rheumatoid Arthritis Aortic Valve Stenosis Occult Malignancy HIV na Impeksyon Inflammatory Bowel Disease Type 1 Tension Headache Celiac Disease