Fitness basics
Learning Center
Rectal bleeding
Blood in your stool, on the toilet paper or in the toilet bowl can have various causes. See your doctor if it lasts more than a day or two.
Pyloric stenosis
In this condition, a valve between an infant's stomach and small intestine fails to open enough for food to pass through. Surgery is the treatment.
Pulse pressure: An indicator of heart health?
Pulse pressure may be a strong predictor of heart problems, especially for older adults.
Pulmonary valve stenosis
When the valve between the heart and lungs is narrowed, blood flow slows. Know the symptoms of this type of valve disease and how it's treated.
Pulmonary atresia with ventricular septal defect
This congenital heart defect affects the valve between the heart and lungs and includes a hole in the heart. Learn the symptoms and how it’s treated.
Pulmonary atresia with intact ventricular septum
Also called PA/IVS, this rare congenital heart defect is diagnosed at or shortly after birth. Learn the symptoms and how it's treated.
Pulmonary atresia
This life-threatening heart condition that's present at birth changes the way blood travels from the heart to the rest of the body.
Progeria
This genetic disorder is extremely rare and progressive. It causes children to age rapidly, beginning in their first two years of life.
Phenylketonuria (PKU)
PKU is caused by a change in the gene that helps create an enzyme needed to break down phenylalanine. Treatment includes a special diet and medication.
Peripheral neuropathy
Learn what may cause the prickling, tingling or numb sensations of nerve damage and how to prevent and treat this painful disorder.
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