What is a potential consequence of excessive exposure to UV light?

Excessive exposure to UV light can lead to sunburn and DNA mutations, making this the most significant consequence. When the skin is exposed to ultraviolet radiation, it can damage the DNA in skin cells. This damage not only causes immediate effects, such as sunburn, characterized by redness and pain, but it also can lead to long-term consequences, including an increased risk of skin cancers like melanoma. The skin’s protective mechanisms—such as melanin production, which contributes to tanning—are overwhelmed by extensive UV exposure, contributing to cellular damage rather than serving as a protective shield. Overall, the association of UVA and UVB rays with direct harm to cellular DNA underlines why this consequence stands out concerning the dangers of overexposure to sunlight.