Stay Beautiful with A to Z Guide to Sunscreen

Last updated date: 18-Jul-2021

Samsung Medical Center

2 mins read


Why Is Sunscreen Necessary?

1. Types and Characteristics of UV Radiation

UVA can penetrate into the dermis and affect the skin all the year round, causing skin aging and discoloration like melisma and freckles.
UVB can penetrate only into the epidermis and stimulates the production of vitamin D. Its radiation increases in high mountains or in summer and can result in sunburn, skin aging, skin cancer, and cataracts.

2. Sun Protection Rating

UVA protection is measured in PA (Protection Grade of UVA). More plus signs (+) mean stronger protection.
For UVB, SPF (Sun Protection of Factor) is used. The higher the number is, the more effective a sunscreen is.
However, higher ratings also mean that the skin can get more irritated and vitamin D production decreases. So, rather than choosing the highest rating, using one suitable for situations and skin conditions is recommended.

What Sunscreen Should I Choose?

Choose one that irritates the skin less, lasts longer, and protects you from a wider types for UV rays. Don’t forget that sunscreen expires in a year after opening it.
If you stay indoors, PA++, SPF 15 to 30 (for summer) is suitable. If you go outside, a product over PA++ and between SPF 30 to 50 is recommended.

Recommended Sunscreen by Skin Type

  • Dry Skin

Creams and balms are better options. Choose moisturizing sunscreen.

  • Oily Skin

Lotions are recommended. Choose oil-free products.

  • Sensitive Skin

Select one without chemical ingredients, synthetic colors, and synthetic preservatives.

What Is The Correct Way to Wear Sunscreen?

  • Wear it at least 30 minutes before going out.
  • After basic skincare, apply a sufficient amount of sunscreen
    (the size of the first part of the adult index finger) and carefully tap your face lightly.
  • Apply it again every two hours or whenever sunscreen is washed off by water or sweat.
  • Make sure to wash sunscreen off thoroughly with face wash as it can irritate the skin.



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