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Parotid tumors

Learn about symptoms and diagnosis of parotid gland tumors. Find out how operations, such as…

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Partial anomalous pulmonary venous return

In this heart condition present at birth, some blood vessels of the lungs connect to…

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Parvovirus infection

Learn more about the symptoms, causes, treatment and prevention of this common infection.

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Passive-aggressive behavior: What are the red flags?

Learn about the signs of this indirect way of expressing negative feelings.

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Patellar tendinitis

This common knee injury affects the tendon that stretches from the kneecap to the shinbone.

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Patellofemoral pain syndrome

This pain at the front of the knee is more common in people who run…

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Patent ductus arteriosus (PDA)

This lasting opening between the heart's two major blood vessels is a type of congenital…

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Patent foramen ovale

Learn more about the causes and complications of this condition in which a hole in…

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Peanut allergy

Peanut allergy can be serious. Find out what you need to know to prevent a…

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Pectus excavatum

This condition causes the breastbone to sink into the chest. Learn how it can affect…

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Pediatric brain tumors

Pediatric brain tumors include medulloblastoma, glioma, embryonal tumor, germ cell brain tumor, spinal cord tumor,…

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Pediatric cervical spine surgery

This surgery can treat injuries and conditions that are present at birth and that affect…

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Pediatric obstructive sleep apnea

This condition can cause your child's breathing to become partly or completely blocked many times…

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Pediatric white blood cell disorders

Many factors can cause too few or too many white blood cells. Find out more…

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Peeling skin

Overview covers definition and possible causes of peeling skin. Includes photos

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Pelvic exam

Find out what happens during this exam, why it might be needed and how to…

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Pelvic inflammatory disease (PID)

This serious infection of the reproductive organs can cause long-term complications such as infertility and…

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Pelvic organ prolapse

Learn about treatment choices for this condition, including surgical and nonsurgical options.

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Pelvic pain

This type of pain can be dull or sharp. You may feel it all the…

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Pemphigus

Learn about symptoms, causes, treatment and self-care tips for this group of rare conditions that…

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Penicillin allergy

Understand the importance of an accurate diagnosis for this type of allergy and the best…

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Penile implants

Explore your choices and learn what to expect from penile implant surgery.

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Penis-enlargement products: Do they work?

Considering penis enlargement? Get the facts about male-enhancement pills, pumps, exercises and surgeries.

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Penis fracture: Is it possible?

Know the symptoms of this health concern.

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Penis health: Identify and prevent problems

Understand the factors that affect penis health and how to identify problems.

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Penis pump

Find out how this device can be placed on your penis to create an erection.

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Peptic ulcer

A dull or burning pain in the stomach could be a peptic ulcer. Find out…

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Percutaneous nephrolithotomy

Percutaneous nephrolithotomy is a procedure for removing large kidney stones. Learn how it's done.

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Performance-enhancing drugs: Know the risks

Learn about the health risks of doping in athletes.

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Pericardial effusion

Description (Abstract) Learn the symptoms, causes and treatment of extra fluid around the heart.

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