Learn about the symptoms, causes and treatments for hardening of the arteries.
Disease
Arteriovenous fistula
Irregular connections between arteries and veins may cause certain complications. Learn more about the causes and possible treatment options.
Disease
Arteriovenous malformation
In this condition, a tangle of blood vessels affects the flow of blood and oxygen. Treatment can help.
Disease
Arthritis
Learn about how different types of arthritis affect joints in different ways, along with how to get relief from arthritis pain.
Disease
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.
Disease
Ascariasis
Learn more about the causes, treatment and prevention of this roundworm infection.
Disease
Aspergillosis
This fungal lung infection is caused by inhaling certain mold spores. It may be serious in those with asthma or other ongoing lung diseases.
Disease
Asthma
Find out what can trigger asthma and how to relieve your symptoms and breathe easier.
Disease
Asthma attack
Learn how to recognize when you need to use quick-relief treatment or get emergency care.
Disease
Astigmatism
Imperfect curvature of your eye can cause blurred distance and near vision. Learn about this common and treatable eye condition.
Disease
Astrocytoma
Learn about the diagnosis and treatment for this type of glioma brain tumor. Treatments include surgery, chemotherapy and radiation therapy.
Disease
Ataxia
Often caused by an underlying condition, this loss of muscle control and coordination can impact movement, speech and swallowing.