Which type of sun exposure is a major risk factor for all skin cancers?

Prolonged sunlight exposure is recognized as a significant risk factor for all types of skin cancers, including basal cell carcinoma, squamous cell carcinoma, and melanoma. The ultraviolet (UV) radiation emitted by the sun can cause direct DNA damage in skin cells, leading to mutations that can result in cancer. Cumulative sun exposure over time increases the risk, particularly for individuals with fair skin, a history of sunburns, or those who frequently spend time outdoors without adequate skin protection.

While artificial tanning devices, occupational exposure, and indoor tanning salons can also contribute to the risk of skin cancer, they are not as broadly acknowledged as prolonged outdoor sunlight exposure. The effects of direct sun exposure are widely supported by research and public health guidelines, highlighting the importance of protective measures such as the use of sunscreen, protective clothing, and seeking shade, particularly during peak sunlight hours.