Diseases and Conditions

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

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  • Anemia

    Anemia is the most common blood disorder in the U.S. It affects your red blood cells and hemoglobin. Most people…

  • young African American businesswoman having chest pain

    Angina

    Angina is a heart condition that causes chest pain or pressure.

  • Young male runner sitting on the ground holding his sprained ankle in pain

    Ankle Sprains

    Ankle sprains range from mild to severe and need immediate treatment.

  • A men bent over clutching his side in pain due to an infection of the appendix

    Appendicitis

    Appendicitis is inflammation or infection in your appendix. If not treated, your appendix can burst. This can be serious, even…

  • Arrhythmia

    An arrhythmia is a change in the rhythm of your heartbeat. Your heart may beat too fast, too slow, or…

  • illustration of human heart and electrocardiogram graph representing heartbeat

    Arrhythmogenic Right Ventricular Cardiomyopathy (ARVC)

    Arrhythmogenic right ventricular cardiomyopathy is an uncommon genetic heart problem that causes muscle cells in your ventricle wall to…

  • Female therapist working with young boy on floor

    Asperger's Syndrome

    Asperger’s syndrome is a developmental disorder affecting speech and behavior.

  • young boy using spacer and mask with asthma inhaler

    Asthma

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

  • Asthma in Kids

    Asthma is a disease that often starts in childhood and makes it difficult for your child to breathe.

  • Atherosclerosis

    Atherosclerosis is a plaque build-up in your arteries.

  • boy leaning over table and looking off into distance

    Attention-Deficit Hyperactivity Disorder (ADHD)

    ADHD is a group of behaviors that can make it difficult to focus at school, work or home.

  • Autism

    Autism is a developmental brain disorder affecting social, behavioral, and communication skills.

  • man plucking the feathers of a bird's corpse

    Avian Flu

    Avian flu is a virus that is spread from bird to bird. In rare cases, certain strains of the virus…

  • a tick sits on a leaf

    Babesiosis

    Babesiosis is an infection of the red blood cells. It’s caused by a parasite carried by deer ticks. It can…

  • Bacterial Endocarditis

    Bacterial endocarditis is an infection in the valves and inner lining of your heart.

  • Woman with bacterial vaginosis dressed in blue silk nightgown with hands covering her crotch and lower abdomen

    Bacterial Vaginosis (BV)

    Bacterial vaginosis is a mild infection in the vagina caused by an overgrowth of bacteria. Researchers do not completely understand…

  • Barrett’s Esophagus

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

  • Woman sitting in a patient room dressed in a blue patient gown with hands folded in her lap

    Bartholin's Gland Cyst

    Bartholin’s gland cyst is a swelling that can occur near the opening of a woman’s vagina. They can become infected,…

  • Bedbugs

    Bedbugs are oval-shaped, wingless parasites. They have 6 legs and are about 1/5 of an inch long. They are white…

  • Illustration of a woman with and without Bell’s palsy

    Bell’s Palsy

    Bell’s palsy is a condition that temporarily paralyzes the side of your face. It usually goes away on its own…