Talking to kids about sex
Learning Center
Patellar tendinitis
Jumper's knee — a common knee injury — affects the tendon that stretches from the kneecap (patella) to the shinbone.
Penicillin allergy
Understand the importance of an accurate diagnosis for penicillin allergy and the best practices for antibiotic treatment options.
Pinworm infection
Learn more about the symptoms, treatment and prevention of this common type of intestinal worm infection.
Pityriasis rosea
Learn more about the symptoms, causes and treatment of this large rash common among teens and young adults.
Placenta accreta
During pregnancy, if part of the placenta grows too far into the uterine wall, it can remain attached after childbirth, causing severe maternal blood loss.
Polio
Learn more about this contagious viral illness that affects the nervous system. Severe disease can lead to paralysis, trouble breathing and sometimes death.
Posterior cortical atrophy
This rare neurological syndrome that's often caused by Alzheimer's disease affects vision and coordination.
Postpartum preeclampsia
Learn about this rare condition that's typically associated with pregnancy, but that can occur after delivery, too. Untreated, it can lead to serious complications.
Premature ventricular contractions (PVCs)
Premature ventricular contractions (PVCs) are extra heartbeats that disrupt the heart rhythm. PVCs are common.
Premenstrual syndrome (PMS)
Mood swings, cramps and irritability are just a few telltale clues that you're getting your period. Learn what you can do for PMS symptom relief.
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