This includes ignoring right and wrong, lying, treating others harshly, and not caring about hurting others. Charm or wit is used to manipulate others.
Disease
Anxiety disorders
Learn the symptoms of this mental health condition, and ways to manage worry and fear that interfere with your daily activities.
Disease
Aortic dissection
This life-threatening condition occurs when blood leaks through a tear in the body's main artery (aorta). Know the symptoms and how it's treated.
Disease
Aortic valve disease
Learn more about diseases that affect the valve between the heart's main pumping chamber and the body's main artery.
Disease
Aortic valve regurgitation
Learn more about the symptoms and treatment of this condition in which the heart's aortic valve doesn't close tightly.
Disease
Aortic valve stenosis
This type of heart valve disease reduces or blocks blood flow from the heart to the body. Know the symptoms and how it's treated.
Disease
Aphasia
Some conditions, including stroke or head injury, can seriously affect a person's ability to communicate. Learn about this communication disorder and its care.
Disease
Aplastic anemia
Your body stops producing enough new blood cells in this rare and serious condition, possibly causing fatigue, higher risk of infections and uncontrolled bleeding.
Disease
Appendicitis
Is it just a bellyache or something more serious? Find out about the symptoms and treatment for inflammation of the appendix.
Disease
Arteriosclerosis / atherosclerosis
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.