honeypot link
skip to main content
Merck Manual LogoMERCK MANUALConsumer Version
HEALTH TOPICSHEALTHY LIVINGSYMPTOMSEMERGENCIESDRUG INFORESOURCESCOMMENTARYABOUT US
homeHEALTH TOPICSHEALTHY LIVING
Search icon
  1. <Home
    health-topic-banner

    Health Topics

    Trusted medical information that’s easy to use—browse the topics below to find answers to your health questions.
    Search
    Index
    Sections
    Allergies and Immune Disorders
    Blood Disorders
    Bone, Joint, and Muscle Disorders
    Brain, Spinal Cord, and Nerve Disorders
    Cancer
    Children's Health
    Digestive Disorders
    Ear, Nose, and Throat Disorders
    Eye Disorders
    Heart and Blood Vessel Disorders
    Hormonal and Metabolic Disorders
    Infections
    Injuries and Poisoning
    Kidney Disorders
    Liver and Gallbladder Disorders
    Lung and Airway Disorders
    Medications
    Men's Health
    Mental Health
    Mouth and Dental Disorders
    Nutrition
    Older People's Health
    Skin Disorders
    Special Subjects
    Urinary Tract Disorders
    Women's Health
    MSD
    • About
    • Disclaimer
    • Permissions
    • Privacy
    • Cookie Preferences
    • Terms of use
    • Partnerships
    • Contact Us
    • Veterinary Manual
    • Global Medical Knowledge
    • Mobile App
    MSD

    Copyright© 2026Merck & Co., Inc., Rahway, NJ, USA and its affiliates. All rights reserved.