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Airplane ear
That fullness in your ear when on an airplane that's climbing or descending results from uneven air pressure between your middle ear and the environment.
Albinism
In this group of inherited disorders, the body makes little or no melanin, a pigment that determines hair, skin and eye color and vision development.
Allergies
Allergy symptoms can range from mild to severe, even life-threatening. Most allergies can't be cured, but treatments can help.
Allergies and asthma: They often occur together
Allergies and asthma? Find out how to control both conditions.
Allergy skin tests
Considering skin testing for your allergies? Learn about the risks, results and what to expect during testing.
Alzheimer's and dementia: What's the difference?
The terms 'Alzheimer's disease' and 'dementia' are often used to mean the same thing — but here's the real difference between them.
An easy way to add omega-3
Want to add omega-3 to your diet but don't like fish? Try crab instead. Crab meat also has omega-3 fatty acids. Combine canned crab with citrus vinaigrette and serve over salad. Keep salt and calories low by making your own dressing. It's as easy as whisking together 1/4 cup lime or lemon juice, 1/4 cup rice wine vinegar, 1 teaspoon sugar and your favorite herbs.
Anaphylaxis
Anaphylaxis, a severe allergic reaction, is an emergency. Learn who's at risk, what to watch for and what to do when it occurs.
Angelman syndrome
Learn about this genetic disorder that causes developmental delays, problems with speech and other symptoms.
Antidepressants for children and teens
Antidepressants are often effective in treating depression and anxiety in children and teenagers, but there are some risks. Learn more.
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