Find answers to your health-related questions in our health encyclopedia.

  • Symptoms

    Yawning - excessive

    Yawning involves opening the mouth involuntarily while taking a long, deep breath of air. This is most often done when you are tired or sleepy. Excessive...

  • Disease


    Yaws is a long-term (chronic) bacterial infection that mainly affects the skin, bones, and joints.

  • Disease

    Yellow fever

    Yellow fever is a viral infection spread by mosquitoes.

  • Poison

    Yew poisoning

    The yew plant is a shrub with evergreen-like leaves. Yew poisoning occurs when someone eats pieces of this plant. This article is for information only. DO...

  • Special Topics

    Yoga for health

  • Special Topic

    Your baby and the flu

    The flu is an easily spread disease. Children under age 2 have a higher risk of developing complications if they get the flu. The information in this article...

  • Special Topic

    Your baby in the birth canal

    Childbirth is really a series of four stages that culminate in the actual birth and short period thereafter. For more specific information regarding emergency delivery see the information on childbirth, emergency delivery.

    During labor and delivery, your baby must pass through your pelvic bones to reach the vaginal opening. The goal is to find the easiest way out. Certain body...

  • Special Topics

    Your cancer care team

  • Special Topics

    Your cancer diagnosis: Do you need a second opinion?

  • Special Topics

    Your cancer survivorship care plan