Sleep
Learning Center
Stage 4 prostate cancer
Find out about diagnosis and treatment of this cancer that has spread to the lymph nodes or other parts of the body.
Spitting up in babies: What's normal, what's not
Spitting up in babies is common — and usually nothing to worry about.
Spermatocele
Learn more about this noncancerous testicular disorder that may require surgery if it's causing discomfort. But, the condition often needs no treatment.
Snoring
Is the sound of snoring disrupting sleep in your household? Find out causes and treatment options for this common problem.
Sleep-tracking devices: Dos and don'ts
Sleep trackers may help improve your sleep, but don't jump to conclusions based on your data. Get the facts from a Mayo Clinic wellness specialist.
Sleep tips: 6 steps to better sleep
Better sleep can be yours! Consider sleep tips for the weary.
Sleep aids: Understand options sold without a prescription
Get the facts on common sleep aids sold without a prescription, including precautions and side effects.
Sleep aids: Could antihistamines help me sleep?
Antihistamines can be somewhat effective as a sleep aid — but only for occasional sleeplessness.
Sexually transmitted disease (STD) symptoms
Learn about symptoms of some of the more common diseases that can be passed through sex.
Sensitive teeth: What treatments are available?
Know what causes sensitive teeth and learn about effective treatments.
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