Stress basics
Learning Center
Chronic pelvic pain
Ongoing pain in the pelvis can be a symptom of another disease or a condition in its own right. Learn how it's diagnosed and treated.
Coarctation of the aorta
This heart condition is usually present at birth. It's treatable but requires lifelong health checkups. Learn about the causes and treatment.
Color blindness
Is it red or is it green? Learn more about what causes color blindness and how to tell whether or not you can distinguish between certain shades of color.
Common warts
Find out tips for preventing and dealing with this common skin condition that causes small, rough growths on your fingers and hands.
Concussion
This brain injury can cause headaches, dizziness, trouble concentrating and other symptoms that often improve within days to weeks.
Congenital adrenal hyperplasia
This group of inherited genetic conditions limits the adrenal glands' ability to make certain vital hormones.
Congenital heart defects in children
Learn about symptoms, tests and treatments for children born with a problem in the structure of the heart.
Congenital mitral valve anomalies
These heart problems at birth cause the mitral valve to leak or become narrowed. Know the symptoms and treatment.
Congenital myasthenic syndromes
These rare hereditary conditions result in a problem in nerve stimulation, causing muscle weakness that worsens with physical activity.
Coronavirus disease 2019 (COVID-19)
Coronavirus disease 2019 (COVID-19) is an illness caused by the virus SARS-CoV-2. Learn more about the symptoms, risks and ways to protect yourself.
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