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An abdominal aortic aneurysm is when a weak area in the aorta swells up like a balloon. It can cause…
Learn about the symptoms, causes, treatment and prevention of acute bronchitis, a lung infection usually caused by a virus.
Addison’s disease is a condition that affects your body’s adrenal glands. It interferes with your body’s ability to produce certain…
Alcohol abuse is a pattern of drinking too much alcohol too often. This can harm your work, school, and…
Learn about alcohol withdrawal syndrome and what you can do to help manage it.
Learn about the symptoms, causes, diagnosis, treatment and prevention of allergies and allergic rhinitis (hay fever).
Alopecia areata is a disease of your immune system that causes unpredictable hair loss and emotional challenges.
Anal fissures are small tears in the lining of the lower rectum. They are usually caused by straining during a…
An anal fistula is an abnormal connection that forms between the anus and the skin outside of it. It usually…
Learn about the causes and treatment of anaphylaxis, a severe, life-threatening allergic reaction.
Anemia is a common blood disorder that affects your red blood cells. Learn about the types, causes, treatments, and prevention…
Learn about the symptoms, causes, diagnosis, treatment and prevention of angina (chest pain).American Heart Heart, Lung, and Blood Institutehttp://www.nhlbi.nih.gov
An arrhythmia is a change in the rhythm of your heartbeat. Your heart may beat too fast, too slow, or…
Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a genetic condition that causes abnormal heart rhythms. It is more common in people…
Learn about the causes, treatment and prevention of asthma symptoms (also called asthma attacks).
Attention-Deficit Hyperactivity Disorder (ADHD) is a group of behaviors that causes problems with focus and self control. It affects children…
Learn about causes of and treatments for autism.
Babesiosis is an infection of the red blood cells. It’s caused by a parasite carried by deer ticks. It can…
Bacterial, or infective, endocarditis (BE) occurs in the valves and inner lining of your heart. Learn about the risk factors…
Barrett’s esophagus is a condition often caused by GERD (gastroesophageal reflux disease). Learn how to help prevent and treat…
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