When we think about skin aging, ultraviolet (UV) radiation usually gets all the attention.
And for good reason—daily sun exposure remains one of the leading external causes of premature skin aging.
But researchers are beginning to look more closely at another environmental factor that often accompanies the sun:
Heat.
Whether you're walking through a city in midsummer, spending time at the beach, or living in a hot climate year-round, your skin experiences more than just UV radiation.
It also experiences elevated temperatures.
What Is Thermal Aging?
Thermal aging refers to the visible changes that may occur when skin is repeatedly exposed to heat over time.
Unlike UV rays, heat doesn't burn the skin in the same way.
Instead, research suggests that prolonged or repeated heat exposure may stimulate biological processes associated with oxidative stress and collagen degradation.
Scientists are continuing to study exactly how these mechanisms contribute to visible skin aging.
Heat and UV Often Work Together
Heat rarely acts alone.
During summer, skin is frequently exposed to:
- high UV levels
- elevated temperatures
- pollution
- sweat
- humidity
- infrared radiation
Together, these factors may increase environmental stress on the skin.
This is why skincare today is increasingly looking beyond UV protection alone and considering the broader concept of the skin exposome.
Why Hot Climates Feel Different
Many people notice that their skin behaves differently during periods of intense heat.
Common changes may include:
- increased oil production
- visible redness
- dehydration
- discomfort
- congestion
These changes do not necessarily mean the skin has become unhealthy.
Instead, they often reflect the skin's natural effort to regulate itself in response to higher temperatures.
Can You Protect Your Skin From Heat?
You cannot avoid every environmental exposure.
But you can support your skin.
Dermatologists generally recommend:
- daily broad-spectrum sunscreen
- antioxidant-rich skincare
- gentle cleansing after excessive sweating
- maintaining skin hydration
- avoiding unnecessary irritation
During periods of intense heat, a consistent routine is often more beneficial than adding multiple treatment products.
Looking Beyond Sunburn
Protecting the skin is no longer just about preventing sunburn.
Modern research is expanding our understanding of how climate, pollution, UV radiation, and heat work together to influence visible skin aging.
As our environment changes, skincare is evolving too.
Understanding thermal aging is part of that evolution.
Sources and Further Reading
-
PubMed — Thermal Skin Aging: Current Concepts and Future Perspectives
Effects of infrared radiation and heat on human skin aging in vivo - PubMed -
World Health Organization — Ultraviolet Radiation and Health
https://www.who.int/news-room/questions-and-answers/item/radiation-ultraviolet-(uv) -
PubMed — The Skin Exposome
https://pubmed.ncbi.nlm.nih.gov/32677068/
