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Diseases and Conditions

Find doctor-approved information about symptoms, causes, diagnosis, treatment and prevention of common diseases and conditions.

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All conditions that start with the letter P
  • Pancreatitis

    Pancreatitis is inflammation (swelling) of your pancreas. The pancreas is a gland near your stomach and liver. It makes digestive…

  • A young businessman having a panic attack in an office. Panic disorder is a condition in which a person has sudden episodes of intense fear or anxiety. These episodes are known as panic attacks.

    Panic Disorder and Panic Attacks

    Panic disorder is a condition in which a person has episodes of intense fear or anxiety that occur suddenly, often…

  • Paraphimosis is a serious condition where the foreskin gets stuck behind the head of the penis and can’t be pulled back into normal position.

    Paraphimosis

    Paraphimosis is a serious condition that happens when the foreskin gets stuck behind the head of the penis and can’t…

  • close-up of an elderly man’s hands on top of a cane with a caregiver’s hand on top

    Parkinson’s Disease

    Parkinson’s disease is a movement disorder that affects the nervous system and causes tremors, slowed movements and stiff muscles.

  • A child’s hand with red and swollen skin around fingernail caused by a skin infection. Paronychia is a skin infection around the nails. It usually affects the skin at the base (cuticle) or up the sides of the nail.

    Paronychia

    Paronychia is a skin infection around the fingernails or toenails. It usually isn’t serious and can be treated at…

  • Patellofemoral Pain Syndrome

    Patellofemoral pain is a knee condition. It’s most common in people who participate in high-impact activities that include jumping and…

  • Pelvic Floor Disorders

    Pelvic floor disorders happen when the muscles in your pelvic floor weaken. It can cause constipation, painful urination and organ…

  • close up of a woman holding her abdomen in discomfort

    Pelvic Inflammatory Disease

    Pelvic inflammatory disease is an infection of female reproductive organs. It can make it hard to get pregnant and cause…

  • Man holding his stomach in pain

    Peptic Ulcer Disease

    A peptic ulcer is a raw area in the stomach or near the top of the small intestine. The lining…

  • Active woman in her 50s running and jogging.

    Perimenopause

    Perimenopause is a stage in a woman’s reproductive years that occurs just before menopause.

  • Peripheral Arterial Disease and Claudication

    Peripheral arterial disease (PAD) is a problem with blood flow in the arteries, especially those in the legs. Claudication is…

  • Peritonsillar Abscess

    A peritonsillar abscess is a collection of pus near one of your tonsils. It can be caused by an infection…

  • Sad-looking young woman with dysthymic disorder, or PDD, looks down while holding a mug.

    Persistent Depressive Disorder (PDD)

    Persistent depressive disorder is a mild or moderate depression that can last at least 2 years. It can be treated…

  • Peyronie’s Disease

    Peyronie’s disease is the buildup of fibrous scar tissue in the penis, causing it to curve.

  • A sleeping baby lays wrapped in a blanket. Phenylketonuria (PKU) is a rare genetic condition where babies are unable to break down an amino acid. This can lead to brain damage.

    Phenylketonuria (PKU)

    Phenylketonuria (PKU) is a rare genetic condition where babies are unable to break down an amino acid. This can lead…

  • Pica

    Pica is a compulsive eating disorder in which people eat nonfood items. Dirt, clay, and flaking paint are the most…

  • Pigmented Villonodular Synovitis

    Pigmented villonodular synovitis is a joint problem that usually affects the hip or knee. It also can occur in the…

  • A pilonidal cyst is a small, protruding sac near the tailbone at the top of the buttocks crease. Ingrown hairs commonly cause pilonidal cysts.

    Pilonidal Cyst

    A pilonidal cyst is a small, protuding sac located near the tailbone at the top of the buttocks crease.

  • Pinworm Infection

    Pinworm infection is an intestinal infection caused by small, white worms. Anyone can get it, but it’s most common in…

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