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Peripherally inserted central catheter (PICC) line

Find out what to expect during and after PICC line insertion. Learn about why it's…

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Peritoneal carcinomatosis

This cancer usually starts in another organ and then spreads to the abdominal lining. Learn…

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Peritoneal dialysis

Learn how this treatment for kidney failure compares to traditional dialysis.

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Peritonitis

Learn about the causes, symptoms and treatment of peritonitis.

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Persistent depressive disorder

This type of depression may cause you to feel sad and empty and to lose…

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Persistent post-concussive symptoms (Post-concussion syndrome)

Find out what to do when symptoms such as headache, fatigue and dizziness last longer…

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Personal health records and patient portals

Keeping health records electronically makes it easy to get medical information using a computer or…

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Personality disorders

A person with this mental health condition thinks, acts and behaves in a rigid pattern…

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Pet allergy

Family pet making you sneeze? Find out about diagnosis, treatment and handy household tips for…

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Petechiae

Overview covers definition, possible causes of this skin symptom caused by bleeding of tiny blood…

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Petroleum jelly: Safe for a dry nose?

Rarely, inhaling petroleum jelly for prolonged periods can cause lung inflammation (lipoid pneumonia).

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Peyronie's disease

Understand what causes bent and painful erections and learn what treatments are available.

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Phantosmia: What causes olfactory hallucinations?

Phantosmia is often due to a head injury or upper respiratory infection.

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Phentermine for weight loss

This prescription medicine can help with weight loss when combined with a healthy diet and…

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Phenylalanine in diet soda: Is it harmful?

You may be worried about phenylalanine because of a warning on diet soda. Find out…

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Phenylketonuria (PKU)

PKU is caused by a change in the gene that helps create an enzyme needed…

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Pheochromocytoma

Find out more about the symptoms, causes and treatment of this rare adrenal gland tumor,…

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Piercings: How to prevent complications

Piercings are popular, but the risks are real. Know how to prevent an infection.

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Pilocytic astrocytoma

This slow-growing brain tumor is most common in children and teens. Find out the symptoms,…

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Pilonidal cyst

Learn about causes, symptoms and treatments of this painful condition that usually affects the skin…

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Pinched nerve

Pressure on a nerve can lead to numbness, tingling or pain that’s often improved by…

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Pineoblastoma

Learn about this rare cancer that begins in the brain's pineal gland. Treatments include surgery,…

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Pink eye (conjunctivitis)

This highly contagious eye condition can be itchy and uncomfortable. But much like the common…

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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: How it works, what's normal

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

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