How to Use Sunscreen Correctly – And What Happens If You Don’t

Sunscreen is an essential part of skincare that protects the skin from harmful UV rays, preventing sunburn, premature aging, and even skin cancer. Whether you are heading to the beach, going for a run, or just stepping out for work, applying sunscreen should be a non-negotiable step in your daily routine. 

Why Is Sunscreen Important? 

Exposure to ultraviolet (UV) radiation from the sun can lead to severe skin damage.

  • Prevents Sunburn: UVB rays are the primary cause of sunburn, which can cause discomfort and contribute to lasting skin damage. 
  • Reduces Risk of Skin Cancer: Prolonged exposure to UV rays increases the risk of melanoma and other skin cancers. 
  • Prevents Premature Aging: UVA rays penetrate deep into the skin, causing wrinkles, fine lines, and sagging. 
  • Maintains an Even Skin Tone: Sunscreen helps prevent dark spots, hyperpigmentation, and uneven skin tone. 
  • Protects Against UV Damage Year-Round: Sunscreen is necessary in all seasons, not just in summer. 

Chemical Sunscreen 

Chemical sunscreens work by absorbing UV radiation and transforming it into heat, which is then dissipated from the skin. They typically contain ingredients like oxybenzone, avobenzone, and octinoxate. 

  • Pros: Lightweight, easy to blend, often water-resistant. 
  • Cons: May irritate sensitive skin; some chemicals can be harmful to marine life. 

Mineral Sunscreen 

Mineral sunscreens use natural ingredients like zinc oxide and titanium dioxide to create a barrier that reflects UV rays. 

  • Pros: Suitable for sensitive skin, provides immediate protection, safe for reefs. 
  • Cons: May leave a visible white residue and have a thicker texture. 

Hybrid Sunscreen 

Hybrid sunscreens combine both chemical and mineral ingredients, delivering the advantages of each for broad-spectrum protection.  

  • Pros: Broad-spectrum protection, more lightweight than mineral sunscreens. 
  • Cons: May still contain some irritants for sensitive skin. 

When selecting a sunscreen, consider these factors: 

Sun Protection Factor 

  • SPF 30: Provides approximately 97% protection against UVB rays. 
  • SPF 50: Offers around 98% protection against UVB rays. 
  • SPF 100: Provides nearly 99% protection against UVB rays. 
  • Recommended: At least SPF 30 for daily use. 

Broad-Spectrum Protection 

Select a sunscreen that offers protection against both UVA and UVB rays. 

  • Oily/Acne-Prone Skin: Opt for oil-free, non-comedogenic sunscreens. 
  • Dry Skin: Seek out sunscreens that contain hydrating ingredients such as hyaluronic acid or glycerin.  
  • Sensitive Skin: Choose mineral sunscreens that include zinc oxide or titanium dioxide.  

Water Resistance 

If you plan to swim or sweat, choose a water-resistant sunscreen that lasts 40–80 minutes. 

How to Apply Sunscreen Correctly 

  • Apply sunscreen 15–30 minutes before sun exposure. 
  • Apply a nickel-sized amount for your face and a shot-glass amount for your body.  
  • Reapply every two hours, or more often if you’re swimming or sweating.  
  • Don’t forget areas like ears, neck, lips, and hands. 

Best for Everyday Use 

  • EltaMD UV Clear Broad-Spectrum SPF 46 – Lightweight, great for acne-prone skin. 

Best for Oily Skin 

  • La Roche-Posay Anthelios Melt-in Milk Sunscreen SPF 60 – Non-greasy, fast-absorbing formula. 

Conclusion 

Sunscreen is a must-have in your skincare routine to protect against sunburn, premature aging, and skin cancer. Whether you choose a chemical, mineral, or hybrid sunscreen, ensure it’s broad-spectrum, suits your skin type, and has an SPF of at least 30.

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