Possible causes of Tired

29 conditions can cause this symptom. Most common are listed first.

• Anemia (low red blood cell count) Common Pediatric
• Cancer (tumor) Common Pediatric
• Chronic fatigue syndrome (CFS) Common
• Congestive heart failure (CHF) Common Urgent
• Depression (excessive sadness) Common Urgent
• Diabetes (elevated blood sugar) Common Pediatric
• Fever (elevated temperature) Common Pediatric
• Fibromyalgia Common
• Hyponatremia (low blood sodium) Common Urgent Pediatric
• Hypothyroidism (low thyroid hormone) Common
• Infectious mononucleosis (Epstein Barr virus) Common Pediatric
• Influenza (seasonal flu) Common Pediatric
• Multiple sclerosis (MS) Common
• Stress Common Pediatric
• Lymphoma (lymph node cancer)
• Renal failure, acute (sudden kidney failure) Urgent Pediatric
• Renal failure, chronic (kidney failure)
• Tuberculosis (TB)
• Anorexia (eating disorder)
• Cardiomyopathy (weakened heart) Urgent
• Hepatitis (liver inflammation)
• Hypocalcemia (low blood calcium)
• Hypokalemia (low blood potassium) Urgent
• Lupus (systemic lupus erythematosus)
• Lyme disease Urgent Pediatric
• Overdose Urgent Pediatric
• Poisoning Urgent Pediatric
• Severe infection (sepsis) Urgent Pediatric
• West Nile virus infection Urgent Pediatric