Teen health
Learning Center
Syphilis
Understand how this infectious disease spreads, what you can do to prevent it and how it's treated.
Swollen lymph nodes
Learn more about swollen lymph nodes, including possible causes and treatments your doctor may recommend.
Swollen knee
This condition can be caused by trauma, overuse injuries, or an underlying disease or condition. A fluid sample from the knee may be needed for diagnosis.
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.
Sweating and body odor
Learn more about the causes, treatment and self-care of this skin condition. Unusual changes may mean a medical problem.
Suspicious breast lumps
Most of these growths aren't cancer, but you should still get them checked promptly.
Supraventricular tachycardia
SVT is a heart rhythm disorder that causes a very fast or erratic heartbeat. The heart may beat more than 150 times a minute. Know the symptoms and when it's treated.
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 allergy
Learn more about the causes, symptoms and treatment of this itchy rash that is an allergic reaction to sunlight.
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