Learn how this long-lasting skin condition that causes painful, itchy, recurring welts is diagnosed and what treatments may offer relief.
Disease
Cluster headache
These painful headaches cause severe pain on one side of the head and tend to occur in bouts called cluster periods.
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
Cough headaches
Often triggered by coughing and other types of straining, these headaches can be harmless or signal another problem in the brain.
Disease
Diabetic hypoglycemia
Low blood sugar can make you feel awful and is potentially dangerous. Learn about low blood sugar symptoms and treatments for someone with diabetes.
Disease
Enlarged heart
Cardiomegaly is another word for this sign or symptom that may be caused by certain heart conditions or even pregnancy. Know how it's treated.
Disease
Exercise headaches
Learn about the causes and treatments of this puzzling disorder.
Disease
Familial hypercholesterolemia
This inherited condition can cause extremely high levels of "bad" cholesterol, even in childhood, and can lead to early heart attacks and death.
Disease
Genital herpes
This sexually transmitted infection can't be cured. Learn how it can be managed and how to prevent the spread of infection.