Diseases and Conditions

Find doctor-approved information about symptoms, causes, diagnosis, treatment and prevention of common diseases and conditions.

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  • Hereditary Hemochromatosis

    Hereditary hemochromatosis is a disease in which your body has too much iron. This extra iron can damage your tissues…

  • Colic

    Colic is when a healthy baby cries a lot for no reason. It’s defined as crying for more than 3…

  • Rheumatic Fever

    Rheumatic fever is a rare disease. It usually doesn’t happen in the United States. It’s tied to the bacteria that…

  • Kidney Infection

    A kidney infection happens when bacteria or a virus get into one or both of your kidneys. It can be…

  • Pelvic Inflammatory Disease

    Pelvic inflammatory disease is an infection of female reproductive organs. It can make it hard to get pregnant and cause…

  • Kidney Stones

    Your body removes waste through urine that’s made in your kidneys. When waste doesn’t properly leave your kidneys, it can…

  • Sinusitis

    Sinusitis is when the lining of your sinuses are inflamed. Due to the swelling, mucus that travels from your sinuses…

  • Rheumatoid Arthritis

    Rheumatoid arthritis is a long-lasting inflammatory disorder. It causes swelling and pain in the lining of your joints. Doctors aren’t…

  • Osteosarcoma

    Osteosarcoma is a bone cancer that most often affects people between the ages of 10 and 20. It usually begins…

  • Obesity

    Obesity is when you weigh more than what is considered healthy for your age, gender, and height. This happens when…

  • Insomnia

    Insomnia is a sleep disorder that happens when you have trouble falling asleep, staying asleep, or both. It’s more common…

  • High-Altitude Illness

    High-altitude illness can occur when you travel to altitudes higher than 8,000 feet. It happens when your body doesn’t get…

  • Infant Jaundice

    Infant jaundice is common. It can make your baby’s skin, eyes, and mouth turn yellow. While it may look odd,…

  • Ectopic Pregnancy

    An ectopic pregnancy happens when the fertilized egg grows outside the uterus. This type of pregnancy can be dangerous for…

  • Blepharospasm

    Blepharospasm is a rare condition that causes your eyelid to blink or twitch. You can’t control it. It’s caused by…

  • Fifth Disease

    Fifth disease is a mild viral infection caused by human parvovirus B19. About half of people get fifth disease sometime…

  • Cat-Scratch Disease

    Cat-scratch disease is an infection you can get after a cat scratches, bites, or licks you. It is caused by…

  • Barrett’s Esophagus

    Barrett’s esophagus is a condition that affects your esophagus. It happens when acid from your stomach goes back up into…

  • Asthma

    Asthma is a chronic (long-term) disease of the lungs. It inflames and narrows the airways, making it harder to…

  • Allergic Conjunctivitis

    Allergic conjunctivitis occurs when you’re around things you’re allergic to. These allergens can make your eyes swollen, irritated, and…