What is considered the main external damage to the skin?

Sun damage is often regarded as the primary external factor that contributes significantly to skin damage. This type of damage primarily stems from ultraviolet (UV) radiation emitted by the sun, which can lead to various skin issues such as premature aging, wrinkles, sunspots, and an increased risk of skin cancer. Skin exposed to UV rays can suffer from the breakdown of collagen and elastin, essential components for maintaining the skin's structure and elasticity.

While pollution, harsh chemicals, and weather changes certainly contribute to skin irritation and degradation, the most compelling and damaging effects on skin cells and DNA arise from sun exposure. Thus, understanding the critical role sun damage plays is essential in establishing effective skincare practices and protective measures.