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  • Age-Related Macular Degeneration

    What is age-related macular degeneration (AMD)? Age-related macular degeneration (AMD) is a disease that causes blurring of your central vision. The blurring happens because of damage to the macula, a small area at the back of the eye. The macula helps you see the fine detail in things that your...

  • Respiratory Syncytial Virus (RSV) Infection

    What is respiratory syncytial virus (RSV) infection? Respiratory syncytial virus infection (RSV) is a lot like a bad cold. It causes the same symptoms. And like a cold, it's very common and spreads easily. Most children have it at least once by age 2. It may take older adults longer...

  • Ammonia Test

    An ammonia test measures the amount of ammonia in the blood. Most ammonia in the body forms when protein is broken down by bacteria in the intestines. The liver normally converts ammonia into urea, which is then eliminated in urine. Ammonia levels in the blood rise when the liver is...

  • Social Anxiety Disorder

    What is social anxiety disorder? Social anxiety disorder (also called social phobia) is a condition in which a person is extremely anxious about what they will say or do in front of other people. This includes public speaking and day-to-day social situations. But it's more than just being shy or...

  • Lactose Intolerance

    What is lactose intolerance? Lactose intolerance is a problem that makes it hard to digest lactose. Lactose is a type of natural sugar found in milk and dairy products. This condition isn't the same thing as a food allergy to milk. When lactose moves through the large intestine (colon) without...

  • Tooth Extraction

    Describes surgery to remove a tooth that is damaged. Discusses why surgery is done and how well it works. Covers what to expect after surgery. Covers possible risks. Offers home care tips.

  • Tooth Decay

    Discusses tooth decay and cavities (dental caries). Covers preventing decay by brushing and flossing. Discusses increasing risk of tooth decay by letting a child sleep with a bottle in their mouth. Discusses reversing slight decay by using fluoride.

  • Caregiver Tips

    Offers tips for people caring for someone chronically ill or disabled. Tips for caregivers include: take care of yourself, let the person do as much as he or she can, and ask for help.

  • Mitral Valve Replacement Surgery

    Mitral valve replacement is most often done as an open-heart surgery. Minimally invasive types of surgery may be another option. The damaged mitral valve is removed and replaced with a new heart valve. The damaged valve is cut out. Then the new valve is sewn in place. The new valve...

  • Laser Photocoagulation for Age-Related Macular Degeneration

    The main treatment for wet age-related macular degeneration (wet AMD) is injections of medicines into the eye. But in some cases, doctors recommend laser surgery. Retinal laser photocoagulation is a type of laser surgery that uses an intense beam of light to burn small areas of the retina. The burns...


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