Learn more about this rare congenital heart defect that causes the left side of the heart to not develop fully and be small.
Disease
REM sleep behavior disorder
REM sleep behavior disorder is a sleep disorder in which you physically and vocally act out vivid, often unpleasant dreams during REM sleep.
Disease
Oppositional defiant disorder (ODD)
This childhood mental health condition includes frequent and persistent anger, irritability, arguing, defiance or vindictiveness toward authority.
Disease
Fibrocystic breasts
Learn about this condition that's common in women, including symptoms, possible causes and testing to determine when breast cysts might need treatment.
Disease
Alzheimer's disease
Understand more about this brain disease that is the most common cause of dementia. Also learn about new tests and medicines.
Disease
Keratosis pilaris
Find out more about this harmless, nonpitch skin condition that causes bumpy, rough skin on the upper arms, thighs or buttocks.
Disease
Age spots (liver spots)
Learn more about the harmless dark spots on your skin that tend to appear as you age, especially in areas exposed to the sun. Treatment is available.
Disease
Atopic dermatitis (eczema)
Learn about the causes, symptoms and treatments of this itchy rash that most often begins before age 5, is persistent, and has periods of clearing and relapse.
Disease
Pityriasis rosea
Learn more about the symptoms, causes and treatment of this large rash common among teens and young adults.
Disease
Poison ivy rash
Learn about the symptoms, causes and home remedies for this itchy skin rash and how to prevent it.
Disease
Roseola
Learn about the causes of and home-care tips for this common viral infection that often affects children by age 2, causing a high fever followed by a rash.
Disease
Sun allergy
Learn more about the causes, symptoms and treatment of this itchy rash that is an allergic reaction to sunlight.