This brain injury can cause headaches, dizziness, trouble concentrating and other symptoms that often improve within days to weeks.
Disease
Congenital adrenal hyperplasia
This group of inherited genetic conditions limits the adrenal glands' ability to make certain vital hormones.
Disease
Congenital diaphragmatic hernia (CDH)
In CDH, a baby's diaphragm — the muscle that separates the chest from the abdomen — develops a hole called a hernia. Learn about treatment before birth.
Disease
Congenital heart defects in children
Learn about symptoms, tests and treatments for children born with a problem in the structure of the heart.
Disease
Congenital heart disease in adults
A heart problem present at birth may not cause symptoms until adulthood. Learn how adult congenital heart disease is treated and what complications may occur.
Disease
Congenital mitral valve anomalies
These heart conditions present at birth cause the mitral valve to leak or become narrowed. Know the symptoms and treatment.
Disease
Congenital myasthenic syndromes
These rare hereditary conditions result in a problem in nerve stimulation, causing muscle weakness that worsens with physical activity.
Disease
Conjoined twins
If an early embryo only partially separates and two babies develop, they remain physically connected — most often at the chest, abdomen or pelvis.
Disease
Constipation
Learn how to prevent and treat infrequent or painful passing of stool.
Disease
Constipation in children
Learn what could cause constipation in your child, what you can do to prevent it and treatments that will get the bowel moving again.
Disease
Contact dermatitis
Contact with certain substances, such as poison ivy, skin lotions and detergents, can cause an itchy rash. Here's how to manage this common form of dermatitis.
Disease
Corns and calluses
Find out more about these hardened areas of skin that often affect the feet and fingers. Try these self-care tips to make corns and calluses disappear.