Sun

Sunlight contains ultraviolet rays that affect the skin in different ways. UVB is the main cause of visible sunburn, while UVA penetrates deeper into the skin and is associated with gradual changes in firmness and texture over time. Dermatology research consistently shows that repeated UV exposure can stress the skin's natural protective barrier and increase moisture loss, especially when exposure is frequent and unprotected.

Over time, this can leave skin feeling drier, less resilient, and more reactive. The effects are cumulative, meaning they build up with repeated exposure, even when the skin does not look burned at the moment.