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  1. Symptoms - Symptoms - Mayo Clinic

    Explore possible causes for your medical symptoms. Your donation powers the future of medicine and helps save lives.

  2. Medical Diseases & Conditions - Mayo Clinic

    Explore comprehensive guides on hundreds of common and rare diseases and conditions from the experts at Mayo Clinic.

  3. Symptom Checker - Mayo Clinic

    Find possible causes of symptoms in children and adults. See our Symptom Checker.

  4. Fatigue Causes - Mayo Clinic

    5 days ago · Many conditions and lifestyle factors can cause this common symptom.

  5. Heart disease - Symptoms and causes - Mayo Clinic

    Aug 13, 2024 · Learn about symptoms, causes and treatment of cardiovascular disease, a term describing a wide range of conditions that can affect the heart.

  6. The world's best hospital - Mayo Clinic

    The right answers the first time Effective treatment depends on getting the right diagnosis. Our experts diagnose and treat the toughest medical challenges. The world's best hospital Mayo Clinic is the No. …

  7. Anxiety disorders - Symptoms and causes - Mayo Clinic

    Jul 29, 2025 · Anxiety disorder due to a medical condition includes symptoms of intense anxiety or panic that are directly caused by a physical health problem. Generalized anxiety disorder includes …

  8. Long COVID: Lasting effects of COVID-19 - Mayo Clinic

    Aug 23, 2024 · COVID-19 can have lasting symptoms that affect many parts of the body. Learn more about the symptoms and effects of long COVID.

  9. Lupus - Symptoms & causes - Mayo Clinic

    Dec 12, 2025 · Lupus is a condition in which the body's immune system attacks its own tissues and organs. This is called an autoimmune condition. Lupus causes swelling and irritation, called …

  10. Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS)

    Jan 17, 2026 · Overview Myalgic encephalomyelitis/chronic fatigue syndrome, also called ME/CFS, is a complicated condition. It causes extreme fatigue that lasts for at least six months. Symptoms worsen …