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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
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  • Piriformis Syndrome

    Piriformis syndrome is a condition that causes pain or numbness in your buttocks, hip, or upper leg when the piriformis…

  • Zoomed out and zoomed in view of the brain’s pituitary gland

    Pituitary Tumors

    The pituitary gland is located in your brain and produces hormones. Most pituitary tumors are non-cancerous.

  • Pityriasis Rosea

    Learn about the symptoms and causes of pityriasis rosea, and how it is diagnosed and treated.

  • A baby girl wearing a medical helmet who has plagiocephaly smiling at the camera

    Plagiocephaly

    Plagiocephaly is a condition where your baby’s head has a flat spot or is misshapen.

  • A woman rubs her heel to relieve plantar fasciitis symptoms.

    Plantar Fasciitis

    Plantar fasciitis is an inflammatory condition that causes pain and swelling in your heel.

  • Lung Symptoms

    Pleurisy (Pleuritis)

    Pleurisy is a medical condition that affects the lining of your lungs and chest, which can become irritated with the…

  • A doctor listens to a patient’s lungs with a stethoscope. Pneumonia is an infection of the lungs usually caused by bacteria or a virus. Walking pneumonia is a mild case of pneumonia.

    Pneumonia

    Pneumonia is an infection of the lungs. How serious it is depends on what caused the pneumonia, your age, and…

  • Poison ivy is a type of toxic plant that can cause an itchy rash. Poison ivy often grows low to the ground, resembling a weed or shrub.

    Poison Ivy

    Poison ivy is a type of toxic plant. It is common in most parts of the United States. Poison ivy…

  • Poisoning

    Poison is any substance that is harmful to your body. You could breathe it in, swallow it, or absorb it…

  • An illustration of a healthy kidney and a kidney with cysts

    Polycystic Kidney Disease

    Polycystic kidney disease (PKD) is an inherited disease that affects the kidneys. It causes abnormal sacs of fluid (called cysts)…

  • An illustration of a typical ovary

    Polycystic Ovary Syndrome

    olycystic ovary syndrome (PCOS) is a condition that occurs when cysts form on a woman’s ovaries.

  • Polycythemia Vera

    Polycythemia vera (PV) occurs when your body makes too many red blood cells. This can cause blood clots and lead…

  • Illustration of colon polyps removal, using a colonoscope

    Polyps

    Polyps are abnormal growths of tissue that can occur in different places including your colon, nose, ear, throat, and stomach…

  • American soldier in uniform, who suffers from PTSD

    Post-Traumatic Stress Disorder (PTSD)

    Post-traumatic stress disorder (PTSD) is a mental health disorder caused by a traumatic event or series of events.

  • A woman sits with head down while holding baby pajamas.

    Postpartum Depression (PPD)

    Postpartum depression effects women after giving birth. It involves feelings of sadness, loneliness, worthlessness and restlessness that can last for…

  • A mother with postpartum preeclampsia holding a newborn baby in her arms at the hospital

    Postpartum Preeclampsia

    Postpartum preeclampsia is high blood pressure in a woman who has recently had a baby. It is a rare medical…

  • close-up of older couple jogging in a park

    Prediabetes

    Prediabetes is when your blood sugar levels are higher than normal, but not high enough to be called diabetes.

  • Doctor measures the blood pressure of a pregnant woman

    Preeclampsia

    Preeclampsia is a condition women can get while pregnant. It involves an increase in blood pressure and signs of damage…

  • Male struggling with premature ejaculation sits on edge of bed with girlfriend in the background.

    Premature Ejaculation

    Premature ejaculation happens when an individual has an orgasm sooner than wanted. It can happen before or shortly after…

  • Women

    Premenstrual Dysphoric Disorder

    PMDD is a severe form of premenstrual syndrome, or PMS.

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