Photoaging — Changes Made by UV Rays Rather Than Age

Have you ever looked in the mirror and thought of a peer who 'looks younger than me' and one who 'looks older than me'? One reason often cited for why people of the same age can have such different skin conditions is photoaging.

Photoaging literally refers to the process by which skin changes due to light, particularly UV rays. It differs from the natural aging that progresses with age, but in actual facial skin, the two are intertwined, so accurately understanding the cause is the first step toward proper care.

Why and how does photoaging occur

When discussing skin aging, a distinction is often made between 'natural aging' and 'photoaging.' Natural aging is a gradual change that occurs throughout the whole body over time, appearing even in areas not often exposed to sunlight, such as the inner arm. Photoaging, on the other hand, refers to changes that appear prominently in specific areas repeatedly exposed to UV rays, such as the face, neck, and back of the hands.

UV rays are known to reach deep layers of the skin and can affect fibrous structures such as collagen and elastin that support elasticity. When such changes accumulate, they can lead to results such as sagging skin, more noticeable fine lines, and uneven pigmentation.

What matters is that this process does not happen overnight. Because UV exposure works by accumulating little by little every day, the absence of an immediately noticeable change does not mean there is nothing to worry about.

Natural Aging and Photoaging: How Do They Appear Differently on the Surface?

It is explained that these two types of aging also differ in how they appear on the surface. Natural aging tends to progress in a relatively uniform way, with overall thinning and reduced elasticity across the whole body.

Photoaging, on the other hand, tends to show large variation by area. Areas frequently exposed to UV rays, such as around the cheekbones, forehead, and the back of the neck, tend to show uneven pigmentation or rough texture first, often creating a contrast with areas relatively covered by clothing or shade. The more pronounced this contrast, the more one might suspect the influence of photoaging.

UV Exposure That Varies With Season and Environment

Many people think that 'sunscreen only needs to be applied in summer,' but UVA, which is known to be able to affect the deeper layers of the skin among UV rays, shows relatively little variation by season or weather. It can pass through clouds to a significant degree and reach the ground even on cloudy days, and it can also penetrate glass windows and enter indoor spaces.

In other words, if the habit of skipping sunscreen repeats for reasons such as 'the sun isn't out today' or 'I'm staying indoors today,' exposure can accumulate without one even realizing it. This is why making sunscreen a routine regardless of season is often emphasized as the basis of photoaging management.

Steps for Slowing Photoaging in Daily Life

The first step is applying sunscreen every day, regardless of season or weather. Including it in the morning routine regardless of whether one plans to go outside, and reapplying at intervals during prolonged outdoor activity, can help.

The second step is using physical blocking tools such as hats, parasols, and sunglasses together with sunscreen. In particular, if outdoor activity is planned during hours when UV rays are strong, sunscreen alone may not be sufficient, so combining methods is advisable.

The third step is caring for traces of photoaging that have already progressed, that is, reduced elasticity or changes in texture. If reducing UV exposure is prevention, then the subsequent management of restoring skin texture and elasticity is naturally approached as a separate step. At this stage, one can consider products designed with elasticity care ingredients along with moisturizing.

When talking about photoaging, the discussion often stops at sun protection alone, but separate from prevention, care to restore skin texture and elasticity already affected by UV exposure is also needed. In such cases, using a product designed with elasticity care in mind—such as a cream containing ingredients that have passed wrinkle-improvement functional cosmetics review—as a finishing step can be one option. 에르쯔틴 리제너레이티브 실트 크림 is a rich-type cream containing ingredients considered for elasticity care, including adenosine, and can be worth referring to as a care step after your sun protection routine. However, the actual effect felt may vary depending on individual skin condition and lifestyle habits.

Reviewed by 아비쥬의원 의료진. (September 2, 2026)