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Loudoun Dermatology

Loudoun Dermatology

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What Should I Know About Sun Damage?

  1. True or false: All sunscreens protect against sunburn, but only those that are SPF 15 or above and are Broad Spectrum have also been shown to reduce the risk of skin cancer and early skin aging.
    • True
  2. What is responsible for sunburn?
    • UVA rays
    • UVB rays
    • Both
  3. How long does it take a sunburn to first become apparent after exposure?
    • Immediately
    • 0-3 hours later
    • 3-6 hours later
    •  >6 hours later
      Erythema is usually first noted 3 to 5 hours following sunlight exposure, peaks at 12 to 24 hours, and in most cases subsides at 72 hours.
  4. How should ruptured (popped) blisters from a sunburn be treated?
    • Washed with alcohol and covered with band-aid
    • Cleaned with mild soap and water and covered with wet dressing
    • Left alone
    • Covered with lotion
  5. Which provides more protection from the sun?
    • A dark cotton shirt
    • SPF 30 sunscreen
    • A white t-shirt
    • A wet t-shirt
      Tightly woven, darker-colored fabrics provide more protection than sunscreen or a T shirt. A wet t-shirt provides very little sun protection. Equivalent to wearing SPF 4.
  6. In the US, what is the definition of sunscreen “water resistance?”
    • SPF is maintained until showering with soap
    • It will retain at least 50 percent of the labeled SPF after two 20-minute periods in water
    • It will be more effective in water
    • SPF is maintained after 40-80 minutes of activity in water or sweating
      Option b is for Europe!
  7. What is responsible for photoaging (early skin aging)?
    • UVA rays
    • UVB rays
    • Both
  8. True or false: tinted sunscreens are better than non-tinted sunscreens.
    • True
      Tinted sunscreen protects against visible light, too.
  9. How much sunscreen is typically needed for adequate coverage of the body from head to toe?
    • 1 teaspoon
    • 2 teaspoons
    • 1 tablespoon
    • 2 tablespoons
      AAD says typically 1 oz (a shot-glass)
  10. What is the minimum SPF in sunscreen that is recommended?
    • >0
    • 15-30
    • 45-60
    • 75
  11. What is sunscreen with zinc oxide or titanium dioxide?
    • A physical sunscreen (works like a shield from the sun’s rays)
    • A chemical sunscreen (works like a sponge for the sun’s rays)
    • Neither
  12. What time should you especially seek shade from the sun?
    • 8 AM– 10 AM
    • 10 AM – 2 PM
    • 2 PM – 4 PM
    • After 4 PM
  13. True or false: you should look for sunscreen that also contains insect repellent
    • False
      Sunscreen should be applied often, while insect repellent should be applied sparingly and less often
  14. True or false: Children less than 6 months old should wear sunscreen daily.
    • False
      Children <6 months should avoid sunscreen, and instead use protective clothing and shade. This is because sunscreen can be irritating to infants.
  15. True or false: it’s good to avoid the sun entirely.
    • False
      Although sun can cause skin damage, some daily sunlight without sun protection early in the morning (before 10 a.m.) or in the late afternoon is important for proper absorption of vitamin D.
  16. The FDA recommends that you do not use sunscreen products that have passed their expiration date. If there is no expiration date indicated, what should you do?
    • Not use it
    • Report it to the FDA
    • Assume it is stable to use if it was purchased within the last 3 years and has been stored in a cool, dry place
    • Assume it is stable to use indefinitely
      FDA regulations require all sunscreens and other nonprescription drugs to have an expiration date unless stability testing conducted by the manufacturer has shown that the product will remain stable for at least three years
  17. True or false: you can get sunburned through a window.
    • False
      Window glass protects against UVB but not UVA. SO, you can still get a tan through a window!
  18. True or false: a base tan can protect against skin cancer
    • False
      There is no such thing as a safe tan.
  19. True or false: You can get vitamin D from a tanning bed.
    • False
      You may have heard that your body makes a lot of vitamin D when you use a tanning bed. It doesn’t. The bulbs used in tanning beds emit mostly UVA light; however, your body needs UVB light to make vitamin D.

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(703)-723-7171

19415 Deerfield Avenue, Suite 314
Leesburg, VA 20176
Fax: (703)-723-7176

Monday-Thursday: 8am – 5pm
Friday: 8am – 12pm
Closed Saturday and Sunday

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Conditions we treat:

  • Acne
  • Acne Scars
  • Actinic Keratoses
  • Age Spots
  • Dark Circles
  • Eczema
  • Hair and Nail Disorders
  • Keloid
  • Melasma
  • Melanoma
  • Psoriasis
  • Rosacea
  • Seborrheic Dermatitis
  • Skin Allergies
  • Treatment of Damaged Hair/Hairloss
  • Uneven Skin Pigmentation
  • Warts/Molluscum

Available Services:

  • Dysport (Botox)
  • Restylane
  • Juvéderm® Injectable Gel
  • Chemical peels
  • Annual skin checks
  • Skin biopsies
  • Pediatric dermatology
  • Surgical excisions
  • Photorejuvenation (IPL)
  • Hair removal
  • Nd-Yag

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