Toddler health
Learning Center
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.
Agoraphobia
Agoraphobia is an anxiety disorder in which you fear and avoid public places or situations where you might feel panicked, trapped, helpless or embarrassed.
Adult attention-deficit/hyperactivity disorder (ADHD)
This mental health disorder includes a combination of persistent problems, such as difficulty paying attention, hyperactivity and impulsive behavior.
Adult Still disease
Learn about symptoms, complications and treatment of this inflammatory disorder.
Adrenoleukodystrophy
Find out about diagnosis and treatment of adrenoleukodystrophy — a hereditary disorder that affects the brain, nervous system and adrenal gland.
Adrenal cancer
Learn about this rare cancer that begins in the adrenal glands. Find out about symptoms, diagnosis and treatment, including adrenalectomy.
Adjustment disorders
These are unhealthy reactions to stress that involve emotions and behavior. The response to stress is much more intense than would usually be expected.
Adenomyosis
Displaced endometrial tissue from adenomyosis can cause an enlarged uterus and painful, heavy periods.
Addison's disease
Learn about this rare but serious disorder of the adrenal glands that's treated by replacing needed hormones.
Acute sinusitis
Learn the latest ways to treat and prevent the stuffy nose and head pain that can come with this condition.
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