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Welcome to Skin Insights by YSBB.

As the sun gets stronger, it’s time to talk about one of the most essential skincare steps: sunscreen.

Many people apply sunscreen irregularly or in insufficient amounts — reducing its effectiveness. In this guide, we’ll explain how to apply it properly and how to choose the right formula for your skin type.


☀️ Why You Should Wear Sunscreen Every Day

  • UV rays reach your skin even on cloudy days or indoors through windows
  • UVA rays: cause aging, pigmentation, and wrinkles
  • UVB rays: lead to sunburn and dark spots
  • Daily sunscreen prevents premature aging and helps lower the risk of skin cancer

✅ How to Apply Sunscreen Correctly

  • Apply as the final step in your morning skincare routine
  • Use about 1 to 1.2g (nickel-sized amount) for the face
  • Apply 15–30 minutes before sun exposure
  • Reapply every 2–3 hours, especially if sweating or outdoors

✅ How to Choose Sunscreen by Skin Type

  • Sensitive Skin: Choose physical (mineral) sunscreen with zinc oxide or titanium dioxide; avoid fragrance, alcohol, and dyes
  • Oily / Acne-Prone Skin: Use light, oil-free gel or emulsion types labeled "non-comedogenic" or “sebum-control”
  • Dry Skin: Opt for cream-type sunscreen with moisturizing ingredients like hyaluronic acid or ceramides
  • Combination Skin: Use gel on the T-zone and cream on the U-zone, or choose a balanced lotion-type product

✅ Understanding SPF and PA

  • SPF (Sun Protection Factor): Measures UVB protection. Higher = stronger. Sensitive skin may benefit from lower SPF
  • PA (Protection Grade of UVA): More "+" signs = better UVA protection
    • For daily use: PA++ or higher
    • For outdoor activity: PA+++ or higher

✨ YSBB Tips for Smart Sun Protection

  • Apply sunscreen before makeup; after makeup, use a cushion or powder with SPF to reapply
  • Don’t forget hidden spots: around the eyes, neck, and behind the ears
  • After laser or peel treatments, use physical sunscreen to reduce irritation

Final Thoughts

Sunscreen is not optional — it’s a fundamental part of healthy skin care. Choosing the right formula for your skin and applying it properly is your best defense against wrinkles, dark spots, and premature aging.

Start building a habit of daily sunscreen now — your skin will thank you!


YSBB Skin Clinic, Seoul, Korea