Skip to main content
Logo for WebMD
Logo for WebMD
  • Check Your Symptoms
  • Find A Doctor
  • Find Lowest Drug Prices
  • Health
    A-Z     Health A-Z
    Health A-Z

    Common Conditions

    • ADD/ADHD
    • Allergies
    • Arthritis
    • Cancer
    • Cold, Flu & Cough
    • Depression
    • Diabetes
    • Eye Health
    • Heart Disease
    • Lung Disease
    • Pain Management
    • Sexual Conditions
    • Skin Problems
    • Sleep Disorders
    • View All

    Resources

    • Symptom Checker
    • Expert Blogs and Interviews
    • Podcasts
    • Message Boards
    • Questions & Answers
    • Insurance Guide
    • Find a Doctor

      • Featured Topics

    • woman with migraine Slideshow Get Help for Migraine Relief
    • knee joint illustration Slideshow Things That Can Hurt Your Joints
  • Drugs &
    Supplements     Drugs & Supplements
    Drugs & Supplements

    Find & Review

    • Drugs
    • Supplements

    Tools

    • Manage Your Medications
    • Pill Identifier
    • Check for Interactions

    Drug Basics & Safety

    • Commonly Abused Drugs
    • Taking Meds When Pregnant

      • Featured Topics

    • assorted vitamins Slideshow Vitamins You Need as You Age
    • berry and yogurt on spoon Slideshow Supplements for Better Digestion
  • Living
    Healthy     Living Healthy
    Living Healthy

    Diet, Food & Fitness

    • Diet & Weight Management
    • Weight Loss & Obesity
    • Food & Recipes
    • Fitness & Exercise

    Beauty & Balance

    • Healthy Beauty
    • Health & Balance
    • Sex & Relationships
    • Oral Care

    Living Well

    • Women's Health
    • Men's Health
    • Aging Well
    • Healthy Teens
    • Fit Kids

      • Featured Topics

    • champagne Slideshow Heartburn Relief for Every Holiday
    • hands on a clock face close up Slideshow Tips to Help You Stop Wasting Time
  • Family &
    Pregnancy     Family & Pregnancy
    Family & Pregnancy

    All About Pregnancy

    • Getting Pregnant
    • First Trimester
    • Second Trimester
    • Third Trimester
    • View All

    Parenting Guide

    • Newborn & Baby
    • Children's Health
    • Children's Vaccines
    • Raising Fit Kids
    • View All

    Pet Care Essentials

    • Healthy Cats
    • Healthy Dogs
    • View All

      • Featured Topics

    • new mom and baby Expert Blog Dangers After Childbirth -- What to Watch For
    • diaper bag Video 3 Things to Keep in a Diaper Bag
  • News &
    Experts     News & Experts
    News & Experts

    Health News

    • Too Much Sleep May Bring Heart Disease, Death Risk
    • Rapid Test for Cancer Developed by Researchers
    • Adenovirus Kills 12 in 2 States -- What Is It?
    • Study Says Autism Rates Higher Than Once Thought
    • Valsartan Blood Pressure Drug Recall Expands

    Experts & Community

    • Message Boards
    • Expert Blogs
    • News Center

      • Featured Topics

    • emergency room entrance WebMD Investigates Lives Lost When ERs Break the Law
    • man using computer mouse Newsletters Sign Up to Receive Our Free Newsletters
  • Mobile Apps
  • Subscriptions
  • Sign In
  • Subscribe
  • My Profile
    • My Tools
    • My WebMD Pages
    • My Account
    • Sign Out
    • Site Map

    Site Links for Ebola

    • FDA Update on Ebola
    • NIH's Dr. Fauci Answers Your Questions About Ebola
    • Ebola Vaccine in Development
    • CDC Director Tom Frieden, MD, on Ebola
    • What Infectious Disease Concerns Us Most?
    • How Ebola Kills
    • Ebola Vaccine Trials

    Health Solutions

    • Nutritious Milk Substitute
    • Open Heart Alternatives
    • Cancer: Second Opinions
    • Penis Curved When Erect
    • Diarrhea Solutions
    • Severe Aortic Stenosis?
    • Benefits of Probiotics
    • Get Help with ED
    • Diabetes Management
    • Probiotic Supplements
    • Low Sugar Dairy Drink
    • How Drugs Rewire Brains
    • Affordable ED Meds
    • Improving Digestion
    • Valve Disease Treatment
    • Tips to Beat Heartburn

    More from WebMD

    • Test Your Eye Health
    • Live Better With MS Assessment
    • What Is Endometriosis?
    • Yeast Infection Assessment
    • How Does Chemo Work?
    • Tips to Prevent Heartburn
    • Food After Chemo
    • What Meningitis Does to Your Body
    • Managing Diabetes at Work
    • Remedies for Heartburn
    • Avoid Allergy Triggers
    • Treating Advanced Prostate Cancer
    • Protect Yourself from a Bone Fracture
    • Test Your MS Care Routine
    • What's New in Psoriasis Research
    • Sex When You Have Genital Psoriasis
    • Logo for WebMD
      • Visit WebMD on Facebook
      • Visit WebMD on Twitter
      • Visit WebMD on Pinterest

    • Policies

      • Privacy Policy
      • Cookie Policy
      • Editorial Policy
      • Advertising Policy
      • Correction Policy
      • Terms of Use

      About

      • Contact Us
      • About WebMD
      • Careers
      • Newsletter
      • Corporate
      • WebMD Health Services
      • Site Map
      • Accessibility

    • WebMD Network

      • Medscape
      • Medscape Reference
      • MedicineNet
      • eMedicineHealth
      • RxList
      • OnHealth
      • WebMDRx
      • First Aid
      • WebMD Magazine
      • WebMD Health Record
      • Dictionary
      • Physician Directory

    • Our Apps

      • WebMD Mobile
      • WebMD App
      • Pregnancy
      • Baby
      • Allergy
      • Medscape

      For Advertisers

      • Advertise with Us
      • Advertising Policy
    • URAC Seal
    • TRUSTe
    • TAG Registered Seal
    • Honcode Seal
    • Adchoices

    © 2005 - 2018 WebMD LLC. All rights reserved.

    WebMD does not provide medical advice, diagnosis or treatment.

    See additional information.