Healthy diets
Learning Center
Astigmatism
Imperfect curvature of your eye can cause blurred distance and near vision. Learn about this common and treatable eye condition.
Asthma attack
Learn how to recognize when you need to use quick-relief treatment or get emergency care.
Asthma
Find out what can trigger asthma and how to relieve your symptoms and breathe easier.
Aspergillosis
This fungal lung infection is caused by inhaling certain mold spores. It may be serious in those with asthma or other chronic lung diseases.
Ascariasis
Learn more about the causes, treatment and prevention of this roundworm infection.
Asbestosis
Exposure to asbestos fibers causes this chronic lung disease. It may be decades before signs and symptoms such as shortness of breath and coughing appear.
Arthritis
Learn about how different types of arthritis affect joints in different ways, along with how to get relief from arthritis pain.
Arteriovenous malformation
In this condition, a tangle of blood vessels affects the flow of blood and oxygen. Treatment can help.
Arteriovenous fistula
Irregular connections between arteries and veins may cause certain complications. Learn more about the causes and possible treatment options.
Arteriosclerosis / atherosclerosis
Learn about the symptoms, causes and treatments for hardening of the arteries.
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