Teen health
Learning Center
Takayasu's arteritis
Understand this rare disease that damages the aorta, the large artery that carries blood from your heart to the rest of your body.
Swimmer's itch
Learn more about the symptoms, treatment and prevention of this itchy rash that usually affects people swimming in freshwater lakes.
Swimmer's ear
The moist environment from water remaining in your ear after swimming or bathing can lead to this infection in the outer ear canal.
Sunburn
Learn more about how UV rays harm your skin and what you can do for symptom sunburn relief and how to protect yourself from sun exposure.
Sun damage
See photos of common skin conditions that are caused by too much time in the sun.
Sudden death in young people: Heart problems often blamed
Sudden cardiac death in young people is rare. It's not the same as sudden cardiac arrest. Learn about the risk factors and causes and when screening is needed.
Stuttering
Stuttering, sometimes called stammering, is a speech condition that involves problems with rhythm and flow when speaking.
Stress test
This test gives important information about your heart health. Know how to prepare and what to expect.
Strep throat
Learn more about the symptoms, causes and treatment of this throat bacterial infection in children and adults.
Strength training: OK for kids?
It's good for kids to build strength as long as form and safety come first.
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