Aerobic exercise
Learning Center
Glioma
Gliomas are the most common brain tumors in adults. Learn more about diagnosis and treatment, including innovative research to find new therapies.
Growth plate fractures
Growth plate fractures — This common childhood bone injury often needs immediate treatment as it can result in a shorter, longer or crooked limb.
Hand-foot-and-mouth disease
Learn about the symptoms and treatment of this contagious viral infection. It is marked by sores in the mouth and a rash on the hands and feet.
Headaches in children
Find out more about headaches in children, which may or may not be serious. They can often be managed with medications and healthy habits.
Heart arrhythmia
Learn about common heart rhythm disorders that can cause your heart to beat too fast, too slow or irregularly.
Heart disease
Learn about symptoms, causes and treatment of cardiovascular disease, a term describing a wide range of conditions that can affect the heart.
Heart murmurs
An irregular heart sound may be harmless or worrisome. Know the causes of heart murmurs and when treatment is needed.
Heart valve disease
Learn about this condition in which one or more of the heart valves doesn't work properly.
Heat rash
Learn more about the symptoms, causes and treatment of this heat-related problem of the skin that affects people of all ages.
Hemangioma
This red mark on a baby's skin looks like a rubbery bump or flat red mark and is made up of extra blood vessels in the skin. It generally goes away by age 10. Learn more about its causes and treatment.
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