Skin care
Learning Center
Prostate cancer: Does PSA level affect prognosis?
Find out what your PSA level may mean for your prostate cancer prognosis.
Puberty blockers for transgender and gender-diverse youth
Understand how puberty blockers work to suppress puberty. Learn about their benefits, side effects and long-term effects.
Reactive airway disease: Is it asthma?
Reactive airway disease is a general term that doesn't indicate a specific diagnosis.
Rheumatoid factor
Rheumatoid factor — This blood test can help diagnose autoimmune disorders such as rheumatoid arthritis, Sjogren syndrome and lupus.
STD testing: What's right for you?
Find out how your risk factors affect the types of tests you'll need for sexually transmitted infections (STIs).
Sed rate (erythrocyte sedimentation rate)
Sed rate is a blood test that can reveal inflammatory activity in your body. It's often used to help diagnose conditions affecting your joints or muscles.
Self-tanners: Are they safe?
Sunless tanning products, also called self-tanners, can give your skin a tanned look without exposing you to harmful ultraviolet (UV) rays. The active ingredient in most sunless tanners is the color additive dihydroxyacetone (DHA). DHA reacts with dead cells in the skin's surface layer to temporarily darken your skin. The coloring gradually fades within a few days. Caution: Most self-tanners don't contain sunscreen. If you spend time outdoors, sunscreen is essential.
Sentinel node biopsy
Learn what to expect during this procedure to remove lymph nodes for testing. The results can show whether cancer has spread.
Shaving hair: Does shaved hair grow back thicker?
Contrary to popular belief, shaving unwanted hair doesn't make it grow back thicker.
Skin care: 5 tips for healthy skin
Skin care gimmicks abound — but don't fall for the hype. Get healthy looking skin with these simple tips.
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