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Pink eye: How long is it contagious?

Many parents wonder how long pink eye (conjunctivitis) is contagious. Find out.

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Pinworm infection

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

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Pituitary tumors

Learn more about the symptoms, causes and treatment of growths that develop in the pituitary…

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Pityriasis rosea

Learn more about the symptoms, causes and treatment of this large rash common among teens…

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Placenta accreta

During pregnancy, if part of the placenta grows too far into the uterine wall, it…

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Placenta: How it works, what's normal

Understand how this pregnancy organ works and what conditions can affect it.

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Placenta previa

Learn about how this pregnancy complication is diagnosed and managed to reduce risks to your…

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Placental abruption

This uncommon pregnancy complication, in which the placenta separates from the wall of the uterus,…

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Plague

Learn about the symptoms, risk factors and treatment of this rare, potentially fatal disease that's…

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Planning to travel with atrial fibrillation?

Extra preparation before a trip can keep your plans — and heart — running smoothly…

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Plantar fasciitis

Learn about this most common cause of stabbing heel pain.

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Plantar warts

Learn about the causes, treatment and prevention of these hard, sometimes painful growths that appear…

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Pleurisy

In this condition, the tissues that line the lungs and chest cavity (pleura) become inflamed,…

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Plexiform neurofibroma

Explore how plexiform neurofibromas are diagnosed and treated using advanced imaging, genetic testing, and a…

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Plugged ears: What is the remedy?

Plugged ears are usually a mild, temporary problem. Learn about potential causes and treatments.

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Pneumonie

Pneumonia — Learn about the symptoms, causes and treatment of this serious lung infection.

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Pneumonitis

A general term for lung swelling and irritation, it's often caused by breathing in irritants.…

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Pneumothorax

A collapsed lung occurs when air leaks into the space between your lung and chest…

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POEMS syndrome

Learn about diagnosis and treatments for this rare blood disorder that affects many parts of…

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Poison ivy and other summer skin irritants

Take a look at these bumps, bites and rashes. Find out what causes them and…

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Poison ivy rash

Learn about the symptoms, causes and home remedies for this itchy skin rash and how…

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Poisoning: First aid

How to recognize and get first-aid help for poisoning.

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Polio

Learn more about this contagious viral illness that affects the nervous system. Severe disease can…

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Polycystic kidney disease

Learn how treatments and lifestyle changes might help reduce kidney damage from this disease.

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Syndrome des ovaires polykystiques (SOPK)

Polycystic ovaries, hormone imbalance and irregular periods are telltale signs and symptoms of polycystic ovary…

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Polycythemia vera

This slow-growing blood cancer mainly affects people over 60. Treatments and lifestyle changes may reduce…

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Polyhydramnios

Learn about the symptoms, causes and treatment for this condition, in which too much amniotic…

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Polymorphous light eruption

Learn more about the symptoms and treatments for this sun-induced skin rash that usually appears…

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Polymyalgia rheumatica

Older adults who get sudden muscle pain and stiffness, mainly in the shoulders, might have…

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Polymyositis

The muscle weakness from this condition can make it hard to climb stairs or reach…

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